F-series Celica Supra axle

**SharpTDI** · 09-07-2008, 11:52 PM

Hello all,

I am trying to convert my 86 Corolla rear end to a 7.5 Celica Supra solid axle rear. The Corolla currently has the stock GTS 6.7 rear end in it with 4.3 R&P.

I tried to check the database at the top of this forum but it does not appear to be working at the moment. Here is what I have learned so far:

1979-1981 RA40 Celicas came with either a F-series 7.5 or a T-series 6.7 rear end. It appears that they were both a 4.10 ratio and both very similar in appearance. The F-series axle has an extra vertical rib in the third member on the drivers side. Axles in the F-series are much larger in comparison to the T-series axles.

Canyone tell me which vehicles had the F-series and which were the same T-series my Corolla is currently running? I am uncertain if it is year specific or engine specific. Any help would be much appreciated.

I am looking into the possibility of swapping the F-series internals into a 6.7 T-series housing. I have heard rumor it can be done but I have no real proof. I plan to find out for myself and post my findings here.

Walter

**thechuckster** · 10-07-2008, 12:47 AM

F-series centre wont fit into a T-series diff, not just size as the bolt pattern for attaching the diff centre is also different.

We (Oz) got some MA45's (which look similar to RA40s) with F-series diffs.

Another diff donor is an MX13 but you need to transfer mounts.

edit: see Rob's post for correction - should be MA46/47 for F-series diffs

**SharpTDI** · 10-07-2008, 01:02 AM

Thank you for the clarification. +rep

In this case I will have to look into swapping a complete 7.5 rear end. Anyone know how to distinguish which of the celica supras had the 7.5 rear versus the 6.7?

**Gavatron** · 10-07-2008, 08:23 AM

I'd say the axle code on the build plate would tell you what diff it has. No idea what the code would be though.

**river** · 10-07-2008, 08:23 AM

Hi,

Get under the car and have a look.

seeyuzz
river

**rob** · 10-07-2008, 08:38 AM

Originally Posted by thechuckster

F-series centre wont fit into a T-series diff, not just size as the bolt pattern for attaching the diff centre is also different.

We (Oz) got some MA45's (which look similar to RA40s) with F-series diffs.

Another diff donor is an MX13 but you need to transfer mounts.

just to be pedantic

the MA45 did NOT come with a F series diff they came with a T series

MA46 and MA47 came with the F series diff

in australia we tend to get MA45's come up every once in a while, they are rare but even rarer is a MA46 in australia. They were not released by toyota they would all be imported.

in the USA the MA46/47 was released by toyota so there might be more chance you would find yourself one.

**Dimitri** · 10-07-2008, 08:54 AM

as has been mentioned, open the bonnet and check the build plate.

if theyre mostly 4.1 ratio like youve mentioned, then the axle code will be F292.

if its T it will be T292.

to familiarize yourself, open your own "hood" and look at your build plate, yours will read T282, or T283 if your car came standard with an LSD.

i think the rumor you refer to may originate from the diff set up Tetsuya Hibino runs.

C&Y sports have built him the set up you described. F code centre and modified axles in standard (well modified to fit the F series parts) AE86 t series housing.

in your situation, living in the U.S, the "celica supra" axle is going to be your best bet.

T3 can supply you a control arm set (4 link)so that it bolts in.

**SharpTDI** · 10-07-2008, 08:35 PM

Thanks again for everyones help. Sorry for the newbie questions I have no idea why I didn't think to look at the build plate. I will be going to have another look at the car this morning.