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displaying posts 1 to 13 of 13
| Author | Subject: Diff bearing preload |
 cully
Seasoned Pro  Location: Cullompton Registered: 12 Jun 2013 Posts: 1,093 Status: Offline |
Post #1
ive been having a mare with my atb diffturns out it was fuggered, iv rebuilt it now to refit ive stripped a second box for some diff crown-wheel bolts and found this box has a shim on the floating diff bearing speedo end... how do you set the preload on the diff bearings? does my ATB need pre load shims and how to set them up? any help would be grand thanks |
 Posted 24th Jun 2016 at 21:16
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barrym
Senior User  Location: Westcliff-on-sea Registered: 26 Jun 2014 Posts: 502 Status: Offline |
Post #2
Been many years since I did anything like this but reckon 0.015" preload will see you alright.Build it up but leave off one of the end plates that hold the drive shaft oil seals. With the outerbearing race in place seat it securely and measure the depth to the race from the 'gasket' face. Measure the depth of the end plate and calculate the amount of shim needed to give the required preloadf. ________________________________________ China D Turbo HDi daily chargerBlack Rallye occassional toy |
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Posted 24th Jun 2016 at 22:05
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barrym
Senior User Location: Westcliff-on-sea Registered: 26 Jun 2014 Posts: 502 Status: Offline |
Post #3
Oh should have asked, are you using new bearings?Preload is essential on new bearings to take up the wear as they bed in. But if re-using old bearings do not change the pre-load as it will wear the old bearings out. ________________________________________ China D Turbo HDi daily chargerBlack Rallye occassional toy |
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Posted 24th Jun 2016 at 22:07
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phillipm
Seasoned Pro  Location: Rotherham Registered: 15 Oct 2006 Posts: 20,607 Status: Offline |
Post #4
0.05mm rings a bell________________________________________ - Bespoke rollcages/additions/adjustments. Half cages right up to complete custom spaceframes - MSA/FIA spec, CDS, ROPT, T45, etc - PM meEmail me! Custom-made polybushes available - need an odd size or fitment? - anything from batch work to one-off pieces. |
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Posted 24th Jun 2016 at 22:25
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #5
oddly the preload shim was only a very early be1 thing, and only re-appeared in the 6 speed box and i think only one thickness.________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 24th Jun 2016 at 22:41
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barrym
Senior User Location: Westcliff-on-sea Registered: 26 Jun 2014 Posts: 502 Status: Offline |
Post #6
I seem to remember someone recently tried to order a shim of a certain thickness and was told they come as a pack of various thicknesses?________________________________________ China D Turbo HDi daily chargerBlack Rallye occassional toy |
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Posted 24th Jun 2016 at 22:53
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craig903
Regular  Location: whitstable Registered: 08 Jul 2013 Posts: 273 Status: Offline |
Post #7
My phase 1 gti6 1997 had a shim. simply bolt the diff housing down and then fit and torque the speedo drive up.________________________________________ 208 GTI OwnerTurbo'd '6 project - work in progress |
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Posted 25th Jun 2016 at 01:09
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cully
Seasoned Pro Location: Cullompton Registered: 12 Jun 2013 Posts: 1,093 Status: Offline |
Post #8
odly peugeot list 3 speedo drive nose clamps with 2 different nose lengths for bearing preload they also list bearing shim sets |
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Posted 25th Jun 2016 at 06:28
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armzsc6
Seasoned Pro  Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #9
Just put back what you took out mate mine is a very early phase 2 and had no shim at all. Replaced the bearings for new SNR ones and refitted with the ATB diff. The speedo housing does the preload just bolted it up and mines been fine with 260bhp for 2 1/2 years. ________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 25th Jun 2016 at 09:45
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cully
Seasoned Pro Location: Cullompton Registered: 12 Jun 2013 Posts: 1,093 Status: Offline |
Post #10
unsure!what is the difference in the shim and not to shim? is it the casing machining or is it the earlier diffs a different width will take some callipers home tonight to measure the two diffs i have and the gearbox |
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Posted 30th Jun 2016 at 14:29
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pete_rallye
Seasoned Pro  Location: Yorkshire Registered: 12 Dec 2002 Posts: 5,253 Status: Offline |
Post #11
Yeah, they come in a pack of various thicknesses. I never thought they were anything to do with preload though, thought they were just to take up any excess movement of the diff once the bearings were pressed on. Either way I have always used them to ensure the diff is a nice snug fit in its housing and never had any issues. ________________________________________ Oulton Park in a BTCC 306 vid 1Oulton Park in a BTCC 306 vid 2 Lap of the 'ring |
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Posted 30th Jun 2016 at 20:24
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cully
Seasoned Pro Location: Cullompton Registered: 12 Jun 2013 Posts: 1,093 Status: Offline |
Post #12
to add to thisIve been to hell and back with this i was asking because once fitted my ATB would pull to the right on power then kick to the left on engine braking what i have found.......... My second hand ATB was f**ked! I've rebuilt it on advise from Quaife refitted the diff now pulled the opposite direction....... started looking into pre-loads on the bearings removed the long shaft and speedo nose to find the nose was 9.6mm NOT 10mm refitted 8.65mm speedo housing with the 1.5mm shimm test drove car is spot on no pull conclusion..... the supposed 10mm speedo housing may have been eroded by a spun bearing in the past, giving me excessive float on the diff |
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Posted 8th Jul 2016 at 10:08
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armzsc6
Seasoned Pro Location: Crowborough Registered: 22 Mar 2008 Posts: 3,445 Status: Offline |
Post #13
Quite possibly. Mine pulls about both ways depending on which wheel it sends the power too which I've always assumed is normal? And never pulls when you let off. Sometimes tries to rip the steering wheel out your hand though if you put your foot down at the wrong time pulling out of a junction lol ________________________________________ Black power baby! SUUUUUPERCHARGED Seat Leon FR TDI 190BHP 300lbft daily gti-6 killer :p 12x 306's owned so far Cambelts, clutches, service work carried out on All makes and models, Peugeot Citroen / mitsubishi specialist. Pug planet / Citroen Lexia diagnostics / code reads available. |
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Posted 13th Jul 2016 at 10:26
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