Phil Read Posted October 23, 2019 Report Share Posted October 23, 2019 My TR4A final drive is leaking badly from the output shaft oil seals. I note that Paddock motors do a recon unit for the TR6 (JPS322L) which includes new bearing, seal etc. Will these fit the TR4A? I note from the parts books the inner axle shaft has different part numbers but are the complete units inter changeable? Quote Link to post Share on other sites
John L Posted October 23, 2019 Report Share Posted October 23, 2019 I know the part numbers are different, as the L/H shaft is just a little bit longer than the R/H, I'm not sure if the splines of the sun gears are the same, but they may be, perhaps somebody else could confirm. John Quote Link to post Share on other sites
Steves_TR6 Posted October 23, 2019 Report Share Posted October 23, 2019 The output shafts come out of the diff easily, the tricky bit is separating the taper to fit new seals. i bolted mine ‘back to back’ which worked nicely, and no leaks in the 5 years since ! Quote Link to post Share on other sites
BlueTR3A-5EKT Posted October 23, 2019 Report Share Posted October 23, 2019 YesTR6 will be interchangeable Quote Link to post Share on other sites
dingle Posted October 25, 2019 Report Share Posted October 25, 2019 I think the only difference is that the keyways on the inner axles are narrower on the TR4A than the TR6. The assemblies should be interchangable. Berry Quote Link to post Share on other sites
rvwp Posted October 26, 2019 Report Share Posted October 26, 2019 Hi Phil, Re separating the output shafts to replace the oil seals, I did the same as Steve but uses some old big end bolts rather than ordinary bolts. Using these bolts mean you can really tighten the bolts without stretching which has always worked for me. Sometimes a hammer blow to the flange is needed once under tension to brake the tapered shaft. Rich Quote Link to post Share on other sites
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