diff welding

LDA · 05-05-2005, 01:00

hey all,

right we started to weld up our diff tonight. got about half of it done so far and was just wondering if we have gone about it the right way. (we have a spare just in case)

we just used a MIG welder to join everything inside the diff to each other. you can see the little gears through the 4 holes on the sub-case so we just pointed the welder in there and bit by bt filled it up.
tomorrow we will finish this job and each of the 4 holes will be totally filled with welds.

does this sound like we are barking up the right tree or have we started a forrest fire that has ruined our diff?

any tips/help very welcome!

thanks

L.

205turbo · 05-05-2005, 13:18

I'm wanting to know if this information is correct also as i wanting to weld my S13 diff aswell

Dave

LDA · 05-05-2005, 15:55

looks like we are on our own. so far our diff is welded as is acting like a welded diff, but we have only done 50% of the welding so far. as soon as we do the other 50% (should be tonight) then we will fit it to the car and test it.

if we get the rest of the car built in time then we should be using it at D1 on sunday and that will be the ultiamte test of our welding.
i'll report back with the results.

L.

205turbo · 05-05-2005, 16:21

Nice one mate......Post your results up because i'm interested in how it holds up

Dave

SteveCarter200 · 05-05-2005, 19:52

Sounds like youve done it the right way, basically just weld all the little gears together. A time saving trick Ive read about is to put bolts between the teetch and weld them in place, saves using up loads of wire as well.

LDA · 06-05-2005, 02:26

thanks steve.
we have finished welding it tonight but as we dont yet have a working gearbox installed we wont be testing till saturday. but i will post back with the results.

L.

LiGhTnInG · 24-10-2005, 12:18

how did this go?

(sorry for old thread bumpage)

205turbo · 24-10-2005, 15:36

I have removed mine for welding just need to clean it up and i'll let you know how hard/easy it was to do

Dave

kickingriffin · 25-10-2005, 02:22

i welded my diff up............i welded the planet gears to the out case thay sit in. put as many welds in as possible .
a welded diff is grate fun........but kills subframe bushes.
there are alloy bushes out there on the market. how about a group buy for these?
also stay away from soft compound tyres thay dont last too long on front or rear,lol
get freindly with you local tyre garage for all the part worns that go to scrap.
if you want this for drifting the not a good idear for the learner as will drift quite fast.ha ha still good fun though.

LDA · 28-10-2005, 01:43

our diff worked very well. and its still working now. not had a problem with it all season. unlike the rest of the car...

i think welded diffs are very good for learners. the will pick up speed while sideways but they step out very progressivly and force you to lift off progressivly too.

we've had the same set of really soft tyres on the front of our car all year! they just wont wear out. the rears burn hundreds of tyres tho.
no understeer and the fronts are fine. if you try to power over too much it pushes the fronts out, a bit more weight shift and they dont understeer at all.

hope your all having fun with your 3 way 100% lock diffs

L.

JJ · 28-10-2005, 12:58

Only thing about welding diffs. Make sure that everything inside the diff is so clean as a plate.
And it`s better to use electrical welding then MIG. What ive heard thats much stronger.

Frenchweapon · 28-10-2005, 17:45

Quote:

Originally Posted by 200SX_Freak

Only thing about welding diffs. Make sure that everything inside the diff is so clean as a plate.
And it`s better to use electrical welding then MIG. What ive heard thats much stronger.

MIG is electrical!!!

I have MIGed my diff in my datto and it works well. However, I will TIG my 200SX open r200 (I wish i had an LSD....) as its much cleaner and you can control penetration and heat much better than with a MIG which also splatters everywhere.

Heres the run down on how to weld up your diff.

1) remove diff centre
2) degrease it with petrol
3) rinse it in water then soapy water
4) rinse again in new soapy water
5) repeat 4
6) dry with air gun
7) heat up in oven to hottest you can go or heat diff centre gears with oxy torch so that it has uniform heat.
8) weld your spider gears and watch your heat as you dont want to create hot spots but if you preheated the diff centre you should be OK.
9) let the centre cool down at ambiant temperature.

There ya go.

Happy welding

RJ200 · 28-10-2005, 18:19

I got my diff welded 3 weeks ago. The guy who welded is was a proffesional welder for years. He used mig.
After the first weld the diff was very hot, he did the second. Had his diner (1 hour) and did the rest.

The diff could be heated up a bit too much but I have no problems with scary noises, so I think it's okay.
Drifting is peanuts, but beware: my gearbox didn't like the clutchdumps and now it whines....

some pics of the welded diff:

JJ · 28-10-2005, 18:24

Quote:

Originally Posted by Frenchweapon

MIG is electrical!!!

I have MIGed my diff in my datto and it works well. However, I will TIG my 200SX open r200 (I wish i had an LSD....) as its much cleaner and you can control penetration and heat much better than with a MIG which also splatters everywhere.

Heres the run down on how to weld up your diff.

1) remove diff centre
2) degrease it with petrol
3) rinse it in water then soapy water
4) rinse again in new soapy water
5) repeat 4
6) dry with air gun
7) heat up in oven to hottest you can go or heat diff centre gears with oxy torch so that it has uniform heat.
8) weld your spider gears and watch your heat as you dont want to create hot spots but if you preheated the diff centre you should be OK.
9) let the centre cool down at ambiant temperature.

There ya go.

Happy welding

Was meaning the MIG then i think....the one without weldingwire.
If so i stand corrected

Paul200sx · 28-10-2005, 21:08

might be worth putting in the useful threads??

205turbo · 31-10-2005, 09:28

Great pics....i'm just gonna get mine welded this week after i give it a clean.

Good to see what the fininshed article will look like.

Just out of interest how did anyone who has done this hold the diff to replace the crown pinion gear???????

Dave

SMiFFAD · 31-10-2005, 09:44

By electrical welding, do you mean ARC welding as opposed to MIG. It would be stronger (just a bugger to do unless your really good at it).

I welded LDA's diff up, and its still holding

(much to my surprise actually given the abuse its got!

) and it was very easy to do, i am no pro welder by a long shot

Baba · 08-11-2005, 15:11

Can you really just weld the S13 diff by taking only the back plate off?

SMiFFAD · 08-11-2005, 15:24

Quote:

Originally Posted by Baba

Can you really just weld the S13 diff by taking only the back plate off?

You can - cos thats what we did... its not ideal, as access is restricted, and it hurts when the whole lots lands on yer toe

. Also get problems with weld splatter, so it needed cleaning out really really well before with put it back together and used it..

xlogic · 07-03-2008, 10:12

I just bought a pre welded diff. Is there anything to watch out for when i fit it? IS it a direct replacement - does anything have to be alligned?

05-05-2005, 01:00	#1
LDA NON-MEMBER Join Date: Feb 2004 Location: Sussex Posts: 1,018	diff welding hey all, right we started to weld up our diff tonight. got about half of it done so far and was just wondering if we have gone about it the right way. (we have a spare just in case) we just used a MIG welder to join everything inside the diff to each other. you can see the little gears through the 4 holes on the sub-case so we just pointed the welder in there and bit by bt filled it up. tomorrow we will finish this job and each of the 4 holes will be totally filled with welds. does this sound like we are barking up the right tree or have we started a forrest fire that has ruined our diff? any tips/help very welcome! thanks L. __________________ "if stuff makes you happy then so be it. if you think your life is richer without stuff then thats cool too. so long as you dont press your version of happy on other people then do as you please."

05-05-2005, 15:55	#3
LDA NON-MEMBER Join Date: Feb 2004 Location: Sussex Posts: 1,018	looks like we are on our own. so far our diff is welded as is acting like a welded diff, but we have only done 50% of the welding so far. as soon as we do the other 50% (should be tonight) then we will fit it to the car and test it. if we get the rest of the car built in time then we should be using it at D1 on sunday and that will be the ultiamte test of our welding. i'll report back with the results. L. __________________ "if stuff makes you happy then so be it. if you think your life is richer without stuff then thats cool too. so long as you dont press your version of happy on other people then do as you please."

05-05-2005, 19:52	#5
SteveCarter200 is a very naughty boy Join Date: May 2001 Location: Colchester, Essex, UK Posts: 23,690	Sounds like youve done it the right way, basically just weld all the little gears together. A time saving trick Ive read about is to put bolts between the teetch and weld them in place, saves using up loads of wire as well. __________________ I'm NOT the Chairman anymore, Ken was. He still likes poo though. But now its Jim. Confusing huh? Blue '89 S13, 362 bhp, slowly getting more battered. Spec Got an E34 M5 as well. Opie Oils : MOT-a-Car : DriftWorks

06-05-2005, 02:26	#6
LDA NON-MEMBER Join Date: Feb 2004 Location: Sussex Posts: 1,018	thanks steve. we have finished welding it tonight but as we dont yet have a working gearbox installed we wont be testing till saturday. but i will post back with the results. L. __________________ "if stuff makes you happy then so be it. if you think your life is richer without stuff then thats cool too. so long as you dont press your version of happy on other people then do as you please."

28-10-2005, 01:43	#10
LDA NON-MEMBER Join Date: Feb 2004 Location: Sussex Posts: 1,018	our diff worked very well. and its still working now. not had a problem with it all season. unlike the rest of the car... i think welded diffs are very good for learners. the will pick up speed while sideways but they step out very progressivly and force you to lift off progressivly too. we've had the same set of really soft tyres on the front of our car all year! they just wont wear out. the rears burn hundreds of tyres tho. no understeer and the fronts are fine. if you try to power over too much it pushes the fronts out, a bit more weight shift and they dont understeer at all. hope your all having fun with your 3 way 100% lock diffs L. __________________ "if stuff makes you happy then so be it. if you think your life is richer without stuff then thats cool too. so long as you dont press your version of happy on other people then do as you please."

05-05-2005, 13:18	#2
205turbo Guest Join Date: Apr 2005 Location: diffin it up somewhere Posts: 1,559	I'm wanting to know if this information is correct also as i wanting to weld my S13 diff aswell Dave

05-05-2005, 16:21	#4
205turbo Guest Join Date: Apr 2005 Location: diffin it up somewhere Posts: 1,559	Nice one mate......Post your results up because i'm interested in how it holds up Dave

24-10-2005, 12:18	#7
LiGhTnInG Banned Join Date: Aug 2005 Location: Sawbridgeworth Posts: 3,012	how did this go? (sorry for old thread bumpage)

24-10-2005, 15:36	#8
205turbo Guest Join Date: Apr 2005 Location: diffin it up somewhere Posts: 1,559	I have removed mine for welding just need to clean it up and i'll let you know how hard/easy it was to do Dave

25-10-2005, 02:22	#9
kickingriffin Banned Join Date: Mar 2005 Location: biggleswade, bedfordshire Posts: 1,509	i welded my diff up............i welded the planet gears to the out case thay sit in. put as many welds in as possible . a welded diff is grate fun........but kills subframe bushes. there are alloy bushes out there on the market. how about a group buy for these? also stay away from soft compound tyres thay dont last too long on front or rear,lol get freindly with you local tyre garage for all the part worns that go to scrap. if you want this for drifting the not a good idear for the learner as will drift quite fast.ha ha still good fun though.

28-10-2005, 18:19	#13
RJ200 Guest Join Date: Sep 2003 Location: Netherlands Posts: 111	I got my diff welded 3 weeks ago. The guy who welded is was a proffesional welder for years. He used mig. After the first weld the diff was very hot, he did the second. Had his diner (1 hour) and did the rest. The diff could be heated up a bit too much but I have no problems with scary noises, so I think it's okay. Drifting is peanuts, but beware: my gearbox didn't like the clutchdumps and now it whines.... some pics of the welded diff:

28-10-2005, 21:08	#15
Paul200sx Guest Join Date: Aug 2003 Location: Bedford Posts: 5,207	might be worth putting in the useful threads??

31-10-2005, 09:28	#16
205turbo Guest Join Date: Apr 2005 Location: diffin it up somewhere Posts: 1,559	Great pics....i'm just gonna get mine welded this week after i give it a clean. Good to see what the fininshed article will look like. Just out of interest how did anyone who has done this hold the diff to replace the crown pinion gear??????? Dave

31-10-2005, 09:44	#17
SMiFFAD Guest Join Date: Nov 2002 Location: Crawley Posts: 5,573	By electrical welding, do you mean ARC welding as opposed to MIG. It would be stronger (just a bugger to do unless your really good at it). I welded LDA's diff up, and its still holding (much to my surprise actually given the abuse its got! ) and it was very easy to do, i am no pro welder by a long shot __________________ Defected to Toyota again.... S14a, MR2, S14, Supra TT, ?????

08-11-2005, 15:11	#18
Baba Guest Join Date: Oct 2003 Location: East London/Essex Posts: 5,633	Can you really just weld the S13 diff by taking only the back plate off?

07-03-2008, 10:12	#20
xlogic Guest Join Date: Apr 2007 Location: Hackney Posts: 290	I just bought a pre welded diff. Is there anything to watch out for when i fit it? IS it a direct replacement - does anything have to be alligned? __________________ XL Pro Audiohere Breaking my S13 Loads of nice parts [url=http://www.sxoc.com/vbb/showthread.php?t=350467 url]