The Lotus Grand Tourers

so my question is ... how can i find out information on the differential.

part numbers identification etc?

I have been doing some research and something cropped up mentioning that a Lexus is200 LSD is also compatible.
if you think about it the history line could point in the direction that the IS200 and the Excel (toyota presumed) differential could be related.

i was just wondering if anyone could help me fill the gaps.

it is this product that suggest this fits an IS200 and an Excel

https://shop.motorsport-developments.co ... 6072-p.asp

Defo Toyota. The manual and autos have different ratios. Bash will be along soon to fill you in - he knows lots about the different ratios available etc.. A limited-slip version is definitely available - I sold one a few years back - bought it from a Toyota breaker.

Pete

if i can source a cheaper LSD id be very happy with that.

any help is well received

Similar price from lotusbits

Hawaiis0 wrote: ↑

Mon Nov 23, 2020 23:41

Similar price from lotusbits

oh absolutely. but if its confirmed that they are the same part and it'll fit I can source a good used one for less.

or even find a breakers with one as some IS200 came with LSD.

I seem to remember paying about £200 for mine - but that was ~ 10 years ago. I eventually fitted a BTR Hydratrak to my Excel track car - LOTS of work!

Pete

Pete Boole wrote: ↑

Tue Nov 24, 2020 10:49

I seem to remember paying about £200 for mine - but that was ~ 10 years ago. I eventually fitted a BTR Hydratrak to my Excel track car - LOTS of work!

Pete

next post "has anyone got a time machine"

fast_wedge wrote: ↑

Tue Nov 24, 2020 13:11

next post "has anyone got a time machine"

Sorry. Sold my DeLorean to a Doctor in Hill Valley

I Have this picture of my back to the future Excel...will this help?

fast_wedge wrote: ↑

Tue Nov 24, 2020 18:06

I Have this picture of my back to the future Excel...will this help?

I do like that. Worthy of a tee-shirt

How long do you want me to bore you for ???
Briefly, the 7.5" diff fitted to the Excel came in a number of ratios, 3.7, 3.9 and 4.1 ( :1 ), non of which had a limited slip. The MA61 Celica Supra, as an option, did have a some fitted with an LSD, but the only way to determine this if you find a scrapper ( unlikely) was either a sticker on the diff casing or intimate knowledge of numbers on the chassis plate. However, there are other ratios. The crownwheel and pinion were fitted into some Toyota pickup live axles in the 80's, these came with a 3.56 ( Ive got one of these ) and an ultra rare 3.3 which was fitted to some 2 litre RWD pickups ( if you find one of these they are worth good money ). Also, some more recent Toyota pickups did have some 7.5" front diffs, but Ive never got my head around thier upside down bits.
The LSD's are a plate type one, but for some reason Toyota missed out one of the friction plates so they are not a particularly agressive diff, but they can be upgraded. A company called Wier transmissions in the states do a rebuild kit with the missing friction plate included which tightens up the diff no end, having said that they are crap at returning emails. There is alot of info about the diffs if you search some of the MA61 forums.
Getting some of the bits for the diffs is getting a little difficult. The crush sleeve for the pinion bearing being one of them, but they can be shimmed. lotusbits can supply most of the bits, including a shim kit ( as can wier transmissions if you can get them the reply to owt ).
Beware of just buying a diff if you are not completely sure what it is, there is a 6.75" one fitted to some smaller toyota models from the 80's and the later Supras are an 8" diff with a completely different casing.
Believe it or not this is a very short version ofabout the diffs but they can be researched easily enough, Ive not looked for a while but Truetrack' I think' may do an aftermarket LSD.

Bash
Ps, if you take one out Helicoil all the mounting bolts for a standard metric thread, the ones fitted as standard are metric fine and I can tell you from experience that one is likely to strip the thread when you put it back, usually the last one ( accompanied by much swearing ). Ive got various diffs and they have been up and down like a brides nighty over the years.

https://toyota-europe.epc-data.com/celi ... 01/41334B/

https://www.celicasupra.com/forums/drivetrain.12/

I knew Bash would know!!

Pete

Bash

thank you very much for your shorten version of Diffs
i appreciate you sharing your knowledge it helps me lots.
i shall venture to the Toyotas world now and do more research