RA28 Celica Update
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After almost two years of abuse the diff in Jerry’s RA28 Celica has finally taken a holiday. To bring you up to speed, we have been involved in the build-up of Jerry’s car for over three years now, first with the engine transplant at our workshop before my back gave out and then with a number of different jobs like hiding the wiring, engine bay respray and interior refit at home on a part time basis.
The engine used is a 1G-GTE originally found in late 80’s early 90’s Toyota Supra’s. It is a six-cylinder 2.0 litre with twin turbos, twin cam head and efi. The engine is basically stock, with the exception of a full rebuild, front mount intercooler, boost control valve and the turbos have been high-flowed and fitted with Subaru WRX internals.
The gearbox is the original 5 speed from the Supra half-cut and when the transplant was done we decided on leaving the original 4 cylinder diff in place and look at a suitable conversion when it gave up the ghost. Little did we know it would last this long!
Recently the diff centre bearings have been getting noisy and the crown and pinion gears show a considerable amount of wear but the clincher was breaking an axle today after pulling second gear mid-way through a corner with quite a few revs on board (on a private road of course!). Here’s the results:-
Now the hunt is on for a suitable replacement differential. My opinion is that a V8 VN Commodore diff should be strong enough and fitting VT Commodore front hubs and calipers and a Commodore master cylinder would achieve a number of things.
Obviously the over-all brake upgrade would be a good thing as the original brakes are marginal at best and the Commodore wheel stud pattern gives Jerry the choice of literally hundreds of different wheels which will be an improvement over the crappy mags on it at the moment.
The mandrel-bent exhaust might be an issue as it closes the gap between diff housing and the floor considerably so that will have to be a consideration in the final choice as everything needs to be legal for hassle-free cruising.
Will keep you updated on our progress.
Craig
