right finally rejoined, now i can annoy folk on here instead of facebook again!
1971 gt6 mk2 rotoflex with rover V8 and 5 speed box
- weak link is the diff. trying to avoid putting the subaru one in that is sat on garage shelf.
So as some of you know I ejected the rear of my diff out the back of the car a while ago, got a temporary diff and now finally took that out to begin (some kind) of rebuild. Both are now stripped on the bench leaving just the pinion in each.
What I have:
- my 'original' 3.89 ratio GT6 six bolt housed diff with front large castle nut - so I have a solid spacer.
- It has large carrier bearings and a very nice tight but smooth differential in it with copper shims
- the rear housing as said was shattered by a pinion tooth wedging under crown wheel - so I have another 6 bolt tail I will use.
- My pinion has lost one of its baby teeth but the CW looks okay.
- This diff WAS nice and quiet.
The temporary diff
- is the holy grail 3.63 but with a spitfire front bracket, 4 bolt rear case, and a shallower nylock front nut - so it should be a collapse spacer.
- it has smaller carrier bearings and the differential is sloppy with approx 0.8mm of play moving a single gear in/out
- The crown wheel has a bit of burring at the edge of the troughs of about 7 teeth and a scored line on the edge of the wheel (not the teeth) of the same number of teeth.
- This diff whines on load of acceleration or deceleration.
Any advice at this point is appreciated.
I cant afford to get the diff sorted by someone brilliant so as neither owes me anything I wish to try myself to make a tough (as possible diff with what I have.
This is what I think i should do:
1. use my GT6 front housing
2. use my spare 6 bolt rear case (tapped for a drain plug)
3. use the 3.63 CWP matched set (even thought potentially still noisy)
4. use my solid spacer (doing all the difficult pre-load and shimming i know will need doing)
**** Can you use a solid spacer on a pinion that uses a collapse spacer?? ****
5. Use my gt6 carrier with the larger bearings
6. replace all seals and bearings.
Questions:
1. will the solid spacer go on the pinion off the other diff? (solid is a stronger)
2. are the output shafts stronger on the gt6 diff? (the shafts look the same but the spitty one has sealed bearings)
3. I'd read that the later (TR7 4 speed) carriers were stronger, but are they stronger than my gt6 one?
Thank you everyone :-)
