Current transmission is a Borg Warner T5 – not world class. Originally I used the tranny Mike picked out – a T50-5. It was from a 1975 Pontiac Sunbird V6 with a 231ci engine. Used that for a few years. Now it has the T5. I was looking for a world class T5 but they were up in the $1000 and over range. I looked around at all the non world class trannies on the road and they didn’t seem to be falling apart so I looked in the swap sheet and picked up the one I’m using now for $110. it was out of a 1986 V6 Chevy something. That was about 15 years ago and I’m still using it so maybe world class wasn’t needed? Of course I don’t beat the crap out of it but I don’t baby it ether. Here’s the ratios for it – Reverse, 1st, 2nd, 3rd, 4th, 5th. It nice because at 65 I’m doing under 1500 rpm.
| 1352-156 | GMC 1986 V6 F Cars 2.8 V6 LB8 | P | 3.76 | 4.03 | 2.37 | 1.49 | 1.00 | 0.76 |
Transmission / Rear end / Suspension –
TRANSMISSION is a Borg Warner T50-5
(from front,toward tranny) here are the final rations that we should end up with – 1st gear 3.10:1, 2nd 1.90:1, 3rd 1.25:1, 4th 1.0:1 and 5th will be 0.8:1.This will run real close to the ratios of the TR8 setup. It was from a 1976 Pontiac Sunbird V6 with a 231ci.
The clutch is a 10″ Chevy, and I was going to put in the standard slave cylinder setup but in reading the MG Enthusiasts site I saw the info about the Mcleod hydraulic bearing setup. It went in without a hitch.
Here are some pictures of the bearing installed. I took these before the clutch cover was installed. The hose to bleed and the hose to the slave cylinder run out the hole where the pivot arm was. 
REAR END is a Chevy Monza 3:08 Positraction.
It has the centered pumpkin and is only 3 inches wider than the original MGB rear end. It needed some pieces welded to it for mounting, but the problem of the larger width was taken care of by having the wheels popped out and rewelded 1″ further out. There was enough room in the fender wells to take up the other 1/2″ on each side.
SUSPENSION
It has a 5/8″ rear sway bar, 3/4″ front sway bar. Traction bars were also fitted.
