delbee1

Can a 3.7 supra rear diff be used on an Escos still running 4 wheel drive??

Caddyshack

I think you MAY need to change the drop gears in the gearbox but maybe it is close enough to the front ratio?, Give Bara motorsports a call and speak to Bara, he can rebuild the supra diffs with the maxi kit and also advise on the ratio and supply whatever you need, he is a top man and his service is the best.

jsa

3.7 & 3.6 are too far apart.

Toyota do have a 47/13 C&P that is the same tooth count as EsCos.

Edit; fixed, now 47/13

ossie cossie

43 and 13 is a 3.31 ratio i think that is wrong. escos is 3.62

ossie cossie

43.11 is 3.9 ratio

ossie cossie

40 to 11 is 3.63 ratio how many teeth does a coswort diff have crown and pinion? thanks

ossie cossie

can you get a 3.9 ratio for the front diff of an escos?

delbee1

Thought getting a Supra diff would be cheaper and more reliable than getting an uprated Escos rear one....

delbee1

Yeah you can get a 3.9 front, I was also thinking about getting 3.9 front and rear but not sure how that would make a motorway journey???

Caddyshack

It won't make it that short, I bet it would still be geared for 160/170 or more.

I have just got Bara to make me up a new diff, cwp, strength plate and quaife atb in 3.9. Was Ł1400

jsa

Ossie,

Thanks, it's 47/13

delbee1

What would the 3.9's do for your acceleration?

ossie cossie

JSA. i have a track escort cosworth i am building up and have a supra LSD rear diff to go in it. i have also got a standard supra diff or JZ90 or something with a supposed 3.9 to 1 ratio. it seem you are quite knowledgable in these diffs would the 3.9 ratio crown and pinion fit iob the LSd diff this has a 4.56 i think in it.

ossie cossie

PM me if you want not to hijack the thread.

Caddyshack

It is supposed to make it accelerate faster.

We do need to consider that Cossies have wide spaces between ratios so the turbo can drop off boost, the perfect solution would be a close ratio box. By lowering the final drive you are making all the gears lower BUT the ratios are still wide apart.

I will let you know when mine is finally back on the road...albeit with the skyline box.

jsa

Pm'd ossie

ossie cossie

My track car too will be skyline 4x4 box and 3.9:1 supra rear diff with 3.9:1 escos front diff ratios. Most parts easier to get here in OZ.