Thread: 4BD1 exh manifold and LT85 questions.

Originally Posted by JDNSW

My 86 110 Isuzu with LT95 is 0.996:1.

John

Yes that's true of LT95 Isuzu's but the LT85 Isuzu's are a different matter as they use a LT230.

well i have read it all, and im confused

Originally Posted by Lotz-A-Landies

Yes that's true of LT95 Isuzu's but the LT85 Isuzu's are a different matter as they use a LT230.

Every LT85 ISUZU I have seen has been 1.003:1 so 4th in an LT85 and 4th in an LT95 isuzu county were the same.

As Jon and others have mentioned, some of the very last countys (88-90 - of which there were very few made due to the huge price hike) had 1.222:1 t-cases.

I replaced my LT95 with a LT85, not sure what the ratio is, it feels high so I suspect its the 1.003:1. What was 4th in the 95 is about 3rd & a 1/4 now.
The LT85 had done 210 000 behind a V8. Pulled down because of output shaft wear, but not much hardfacing on most of the bearing left.

Originally Posted by rar110

My wife complains about the heat under the passenger side floor so will probably re-route out through the inner guard as per factory spec.

Be prepared for the complaints to continue... My wife is used to the factory set up getting hot under foot, particulary summer. In winter (down here in Vic) though I call it a built in floor warmer - mmm, warm, toasty feet.

Rob

The only commercial overdrive I know of for the LT95 is the Fairy unit. I put a new one in one of my old rangies - it was expensive and noisy. They are reputed to be weak, but mine lasted while I had it. They were only suitable for the torque of the old 3.5 V8 in top gear and not strong enough for torque available in lower gears. AFAIK they are no longer made.

Some years back, Bill Larman made his own overdrive, splitter from a spare LT95.

It was 7-3/4" long including an adaptor plate for a Ford gearbox. Because it was fitted in front of the gearbox it was only subjected to engine torque and could be used to split the lower gears, as well as for overdrive in top gear.

He used 4th and 3rd gears from the LT95, and reversed the gears so that 3rd gave the overdrive (about 34%).

Here are some pics of Bill's splitter from another forum. The 1st shows assembly of the modified LT95 internals, the 2nd is a view from the rear of the splitter, the 4th shows the splitter mounted in front of a Ford truck gearbox.

Originally Posted by Bush65

The only commercial overdrive I know of for the LT95 is the Fairy unit. I put a new one in one of my old rangies - it was expensive and noisy. They are reputed to be weak, but mine lasted while I had it. They were only suitable for the torque of the old 3.5 V8 in top gear and not strong enough for torque available in lower gears. AFAIK they are no longer made.

Some years back, Bill Larman made his own overdrive, splitter from a spare LT95.

It was 7-3/4" long including an adaptor plate for a Ford gearbox. Because it was fitted in front of the gearbox it was only subjected to engine torque and could be used to split the lower gears, as well as for overdrive in top gear.

He used 4th and 3rd gears from the LT95, and reversed the gears so that 3rd gave the overdrive (about 34%).

Here are some pics of Bill's splitter from another forum. The 1st shows assembly of the modified LT95 internals, the 2nd is a view from the rear of the splitter, the 4th shows the splitter mounted in front of a Ford truck gearbox.

I love Bill's awesome inventions!!!

Does anyone know what he is up to these days?

As a slight digression,
The rover overdrives were even weaker, and also for use in 4th only, however I knew some people who got away with using them as splitters in low and high range when needed. e.g. 1st low + overdrive is a very nice gear between 1st and second - when you need some extra speed but the hill is too steep for 2nd. However you had to be very gentle, even with a 2.25...

Originally Posted by isuzurover

I love Bill's awesome inventions!!!

Does anyone know what he is up to these days?

...

Bill does remarkable work and his knowledge, foresight and application is outstanding. He doesn't have access to lathes and the like now, to continue developing similar projects like in the past.

I haven't heard too much from him for some time, but he still pops up from time to time.

From what I understand his property was burnt out in the Vic bush fires.