Samurai 20V Posted August 26, 2011 Share Posted August 26, 2011 Gents, I have a 1994 RZ TT6, which has the big diff, with the cooling fins on the casing.. I was under the impression that the 1996 onwards (facelift) RZ TT6 has the casing without the cooling fins, but after reading this on Supraforums I am confused.. RZ 6-spd 93-5/96 (V160)---- 3.266:1, LSD standard, big diff, big flange, cooling 'ears' on diff cover, Code B03B RZ, RZ-S 6-spd 6/96-2002 (V161)---- 3.266:1, LSD standard small diff, big flange, cooling 'ears' on diff cover**** Code A03B Is this the right diff for my car? The ad says that is for a Getrag box, but not the year model. I thought the way to tell the big diff was the cooling fins/ears, but according to the Supraforums not? Thanks for your help.. Quote Link to comment Share on other sites More sharing options...
Homer Posted August 26, 2011 Share Posted August 26, 2011 I'm pretty sure the one you pictures is the "pre-facelift" big diff as the diff is offset. The letter at the start of the diff code dictates if it is the large or small casing (B being large, A being small). There isn't a specific year/month cutover for the diff due to the "crossover" issues, however the easy way to tell is if the car the diff came from had a v160 or v161 gearbox. All v160 TT's had the large B diff, the v161's and every other model has the A diff. Can't say I've ever seen the A03B with the bif rear cooling plate, but someone on here with a v161 TT should be able to easily confirm Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted August 26, 2011 Author Share Posted August 26, 2011 I'm pretty sure the one you pictures is the "pre-facelift" big diff as the diff is offset. The letter at the start of the diff code dictates if it is the large or small casing (B being large, A being small). There isn't a specific year/month cutover for the diff due to the "crossover" issues, however the easy way to tell is if the car the diff came from had a v160 or v161 gearbox. All v160 TT's had the large B diff, the v161's and every other model has the A diff. Can't say I've ever seen the A03B with the bif rear cooling plate, but someone on here with a v161 TT should be able to easily confirm Thanks Homer, that was my understanding as well... I think the info on Supraforums is not correct.. Can anybody with a V161 Getrag confirm if their car has the cooling fins as well? Quote Link to comment Share on other sites More sharing options...
dude Posted August 27, 2011 Share Posted August 27, 2011 A type diffs do not have cooling fins Quote Link to comment Share on other sites More sharing options...
dandan Posted August 27, 2011 Share Posted August 27, 2011 I'm 99% certain I have a V160 with the small diff. Will check later Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 27, 2011 Share Posted August 27, 2011 I've never seen the "big" diff without the rear cover with the cooling fins. Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted August 27, 2011 Author Share Posted August 27, 2011 I've never seen the "big" diff without the rear cover with the cooling fins. But have you seen a small diff with the cooling fins Chris? Quote Link to comment Share on other sites More sharing options...
Samurai 20V Posted August 27, 2011 Author Share Posted August 27, 2011 A type diffs do not have cooling fins 100% sure? I want to buy this as a spare and fit a TRD LSD to it... Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted August 27, 2011 Share Posted August 27, 2011 I haven't seen a small one with fins, no, but maybe the covers are interchangeable? Pity Toyota don't use a gasket, you could compare part numbers for the gaskets. Quote Link to comment Share on other sites More sharing options...
David P Posted August 27, 2011 Share Posted August 27, 2011 The finned rear plate on the big diff has some different hole spacings, it can be modified to fit the small diff, but is not a straight swop. Quote Link to comment Share on other sites More sharing options...
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