Wavetrac LSD replacement

Wavetrac LSD replacement

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Discussion

FoxdieUK

Original Poster:

441 posts

139 months

Monday 28th July 2014
quotequote all
Cars back on the road now with a bill of £1659.80;
  • £800 Wavetrac Diff
  • £420 Bearings, seals, labour for diff rebuild, labour for fitting
  • £372 Spare diff casing incl. crown and pinion wheels
  • £68 for oils (two fills, before to keep it running and another after replacement)
I've gotta take it easy for the next 500-1000 miles before I can really push it but I have to say it initially feels even better than before any of this drama happening, fast and nimble around roundabouts with no tyre skippage and quiet as a mouse. There's been a faint whine for a couple of months that I presumed to be low brake discs (they were 1mm under the manufacture recommended spec according to Roger back in November) but it must have been the diff running dry.

Expensive lesson learnt; If you hear any noises, no matter how faint or if you think it's something else, get it checked out straight away.

Edited by FoxdieUK on Monday 28th July 19:28

SturdyHSV

10,083 posts

166 months

Monday 28th July 2014
quotequote all
Glad it's back and running, I will confess I expected to scroll down to find a video of a mahoosive peelout though hehe

FoxdieUK

Original Poster:

441 posts

139 months

Monday 28th July 2014
quotequote all
Oh don't worry, if anything this Wavetrac should be far more suited to that kinda thing, just gotta wait 1k smile

mik_ok

1,568 posts

240 months

Monday 28th July 2014
quotequote all
Well done Foxdie. So were the bearing numbers you quoted correct? And where did you source seals?

FoxdieUK

Original Poster:

441 posts

139 months

Monday 15th September 2014
quotequote all
Posting an update 1000 miles on. No drama whatsoever.

The only thing that's different is a faint whine at 60 MPH* at very light load (ie. flat motorway cruising), uphill and downhill its not there, nor at any other speed. I can live with that smile

As for how it's doing...


Part 1
Part 2

Now I gotta chase overheating smile


 * The whine is actually caused by the slightly rounded pinion and crown, not the new Wavetrac part, the whining won't affect operation 


Edited by FoxdieUK on Monday 15th September 22:12

FoxdieUK

Original Poster:

441 posts

139 months

Monday 15th September 2014
quotequote all
Told mik this in an email, will chase the rebuild company for the part numbers now. The only problem was the shims, needed to use two sets (from both diffs) and then grind them down to get them to fit, it may be worth getting fresh shims and grinding them down to suit.

snowwolf

11,503 posts

174 months

Monday 15th September 2014
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No wonder you want goldy's old tyres!!!!!!! LOL nice one

ringram

14,700 posts

247 months

Tuesday 16th September 2014
quotequote all
My money would go on a camaro diff at half the price.
Not a wave trac, but bigger and stronger anyway..

Jupp318

102 posts

138 months

Tuesday 16th September 2014
quotequote all
Ringram, I see this http://www.ebay.com/itm/Chevrolet-Camaro-SS-3-91-L... Camaro Diff on eBay without a cover, will the Standard Monaro Diff cover fit?. I've seen articles about certain years of Corvette that had a weak diff, are our woes the same?. It would be most useful if a list could be made to show what Diffs are replacements for what model 'Ro, VXR8 etc. I can see why folks can get nervous when they are not cartain about what they are ordering.

SturdyHSV

10,083 posts

166 months

Tuesday 16th September 2014
quotequote all
Just to chip in with the cheap option, my rear tyres are at the exciting stage again, and despite regular testing hehe I've still not experienced this locking/unlocking from the truetrac people say about.

If it takes a wheel to be in the air for it to become a problem, then I think should that happen, the state of the diff is going to be the least of my concerns...yikes

KMud

2,924 posts

155 months

Tuesday 16th September 2014
quotequote all
SturdyHSV said:
Just to chip in with the cheap option, my rear tyres are at the exciting stage again, and despite regular testing hehe I've still not experienced this locking/unlocking from the truetrac people say about.

If it takes a wheel to be in the air for it to become a problem, then I think should that happen, the state of the diff is going to be the least of my concerns...yikes
Don't go messing up your posh seats tongue out

mik_ok

1,568 posts

240 months

Tuesday 16th September 2014
quotequote all
ringram said:
My money would go on a camaro diff at half the price.
Not a wave trac, but bigger and stronger anyway..
Ringram - as per my question on the previous page - do you have a link to a seller?

ringram

14,700 posts

247 months

Tuesday 16th September 2014
quotequote all
Vxr8 option only remember.
Try Brent at nook and tranny for a new oem one.

FoxdieUK

Original Poster:

441 posts

139 months

Wednesday 17th December 2014
quotequote all
Hi folks, posting an update here.

So about 3000 miles after getting the diff rebuilt and 1 skid pan day, the car had to go back to the gearbox firm for a rebuild because one of the output shafts (the drivers / off-side) started to develop a lot of play, had split the seal and lost oil.

Post-mortem revealed one of the shims had crushed one of the roller bearing cage, it was protruding out of the cup / outer ring (not sure if this is normal, it was a genuine Timken bearing) and the shim squashed it causing it to deform inside and collapse.

They've solved it by boring out one of the shims to allow the replacement bearings cage to protrude through without it touching anything, with another thinner bore shim on the outside.

All in all there are 5 shims to brace the diff whereas I believe the stock diff may have 4, it appears the Wavetrac LSD center is in the region of about 5-10mm shorter than the stock ZF LSD center and this needs to be compensated for.

The bill for this round was £140, taking the total expenditure to just shy of £1800.

Given how much this has cost me now, I think ringrams suggestion of a Camaro 1LE rear diff would probably have been wiser however I still cannot find what part code for a 3.71 diff.

Ringram, you able to shed some light on exact part numbers for future readers?

Behold81

2,931 posts

168 months

Wednesday 17th December 2014
quotequote all
What style diff is the camaro???

anyone looking at fitting one to a Monaro???

MyM8V8

9,456 posts

194 months

Wednesday 17th December 2014
quotequote all
FoxdieUK said:
Hi folks, posting an update here.

So about 3000 miles after getting the diff rebuilt and 1 skid pan day, the car had to go back to the gearbox firm for a rebuild because one of the output shafts (the drivers / off-side) started to develop a lot of play, had split the seal and lost oil.

Post-mortem revealed one of the shims had crushed one of the roller bearing cage, it was protruding out of the cup / outer ring (not sure if this is normal, it was a genuine Timken bearing) and the shim squashed it causing it to deform inside and collapse.

They've solved it by boring out one of the shims to allow the replacement bearings cage to protrude through without it touching anything, with another thinner bore shim on the outside.

All in all there are 5 shims to brace the diff whereas I believe the stock diff may have 4, it appears the Wavetrac LSD center is in the region of about 5-10mm shorter than the stock ZF LSD center and this needs to be compensated for.

The bill for this round was £140, taking the total expenditure to just shy of £1800.

Given how much this has cost me now, I think ringrams suggestion of a Camaro 1LE rear diff would probably have been wiser however I still cannot find what part code for a 3.71 diff.

Ringram, you able to shed some light on exact part numbers for future readers?
I doubt he will be back here anytime soon, and who can blame him?

He did reply to your query before by suggesting you contact Nook & Tranny in the states for a price and details.




gsd2000

11,515 posts

182 months

Wednesday 17th December 2014
quotequote all
Behold81 said:
What style diff is the camaro???

anyone looking at fitting one to a Monaro???
anything can be made to fit

Gary H 2008

3,507 posts

188 months

Wednesday 17th December 2014
quotequote all
MyM8V8 said:
I doubt he will be back here anytime soon, and who can blame him?
It seems to have become a Tyre Shop rolleyes

Behold81

2,931 posts

168 months

Thursday 18th December 2014
quotequote all
gsd2000 said:
anything can be made to fit
True. But how different is it.

I'm assuming sub frame mounts are different. Input shafts and prop are different fittings so all need fabricating??

just curious how much needed fabricating.

I want a predictable drift motion.

monkfish1

10,874 posts

223 months

Thursday 18th December 2014
quotequote all
Behold81 said:
True. But how different is it.

I'm assuming sub frame mounts are different. Input shafts and prop are different fittings so all need fabricating??

just curious how much needed fabricating.

I want a predictable drift motion.
Completely different. If you are going to that much work, you might as well just choose a proven tough diff unit of whatever car fits the bill.