Thread: Isuzu Flywheel housing three bolt 12V STARTER

Originally Posted by rijidij

G'day Justin,
I got your email etc but I've been in Outback Australia for 4 weeks, so haven't been able to reply untill now.
A mate of mine who works on Land Rovers for a living was easily able to source a brand new flywheel housing for me last year, as well as a flywheel. The housing part number is 8944419332. I think it is a genuine Isuzu part number by the look of the label that came with it.

As to which gearbox to go with, I think you will find 'most' 4BD1t owners will say the Lt95 is the best option to be able to handle the touque of the turbo engine. That's if you're just talking about Rover boxes, especially if you have the split casing Lt85 which is the weaker version.
The 5 speed is good as far as having an overdrive gear to keep the revs down at high speed, but the high ratio transfer gears in the Lt95 are fairly easy to change also, it depends just what you want from your engine. I chose to go with 1.113 gears in my Lt95. These are standard gears from early Rangies and the next closest to the standard Landy Isuzu gears at 0.999 which I thought would be a bit 'tall' for what I wanted. I've been more than happy with the performance from the turbo engine so far running a maximum boost of just under 10psi.
Also, if you go for the Lt95, make sure you get the turbo pressure plate for the clutch. I made the mistake of using a non-turbo one thinking it would be ok as it was brand new, but it just couldn't handle the touque.

Cheers, Murray

Murray... Thanks for the info. As I'm new to the challenges of engine swaps. I'm not clear on the whole gear ratio thing. I've tried to read as much info on here regarding what the correct gear ratios are to use behind the 4bd1t Isuzu and why, but it might as well all be written in Chinese. Can anyone jump in here and explain how the gear ratio works and how the different ratios affect how your truck drives. I have been told to use a ratio of 0.996 by a few guys if I use the LT 95 box. My santana LT 85 BOX / LT230 TC has a low ratio of 3.321 and a high ratio of 1.410 as fitted to my 3.5 V8. A Mate of mine here in Canada just bought a isuzu powered 130 from The U.K also with an LTt85 / LT230 TC his low ratio is the same as mine 3.321 but his High ratio is 1.222 Not sure what the numbers mean. I hope some one will be up to explaining this. Maybe a dumb question but I'll never know unless I ask.

Cheers...Justin

Originally Posted by 130 ambulance

Murray... Thanks for the info. As I'm new to the challenges of engine swaps. I'm not clear on the whole gear ratio thing. I've tried to read as much info on here regarding what the correct gear ratios are to use behind the 4bd1t Isuzu and why, but it might as well all be written in Chinese. Can anyone jump in here and explain how the gear ratio works and how the different ratios affect how your truck drives. I have been told to use a ratio of 0.996 by a few guys if I use the LT 95 box. My santana LT 85 BOX / LT230 TC has a low ratio of 3.321 and a high ratio of 1.410 as fitted to my 3.5 V8. A Mate of mine here in Canada just bought a isuzu powered 130 from The U.K also with an LTt85 / LT230 TC his low ratio is the same as mine 3.321 but his High ratio is 1.222 Not sure what the numbers mean. I hope some one will be up to explaining this. Maybe a dumb question but I'll never know unless I ask.

Cheers...Justin

The ISUZU is a low-revving engine with lots of torque. That is why you need to use high (numerically low) high range ratios in the transfer.

Assuming you have a 4 spd (LT95) in 4th:
with 1.4:1 high range gears, if the engine is doing 1400rpm, the propshaft(s) will be doing 1000rpm.

With 0.996:1 high wange gears in the same situation, the propshafts would be doing about 1400rpm as well.

With 1.2:1 you would be somewhere in between.

The 4BD1(T) only revs to about 3400 rpm in most specs. Depending on tyre size, that gives a top speed of about 140km/h in an LT95 with 0.996:1 gears. If you fit lower (numerically higher) ratios, you will have a lower top speed.

Originally Posted by isuzurover

The ISUZU is a low-revving engine with lots of torque. That is why you need to use high (numerically low) high range ratios in the transfer.

Assuming you have a 4 spd (LT95) in 4th:
with 1.4:1 high range gears, if the engine is doing 1400rpm, the propshaft(s) will be doing 1000rpm.

With 0.996:1 high wange gears in the same situation, the propshafts would be doing about 1400rpm as well.

With 1.2:1 you would be somewhere in between.

The 4BD1(T) only revs to about 3400 rpm in most specs. Depending on tyre size, that gives a top speed of about 140km/h in an LT95 with 0.996:1 gears. If you fit lower (numerically higher) ratios, you will have a lower top speed.

Thanks isuzu rover... It's all starting to make sense

Now I think I'm starting to get it So if I go with the LT95A box with a 0.996 ratio It will actually be higher in 4th than the 5th in my current set up of 5 speed LT85/230TC 1.4:1 Meaning i'm going to move just as quick with out over revving the engine and I really wont miss the fifth gear at all. Next question i have is.... Will having a military salisbury rear diff cause any problems with gearing that I should be aware of.

Am I ever glad I met you guys I've learned so much in such a short time It's a shame your all in Aus..... Canada could use a few of you. I think it's time to put the truck on a RORO Ferry not sure if they will let me push it on though.
Maybe when the swap is finnished!

Regards, Justin

hi ive got several adaptor plates to fit isuzu truck engines to land rover v bell housings they work very well can send photos if required

Originally Posted by balki

hi ive got several adaptor plates to fit isuzu truck engines to land rover v bell housings they work very well can send photos if required

I'm up for that, can't wait to see the pictures...

PM ON THE WAY!

Regards
Justin

Can anyone give me the bolt pattern on the LT95 bellhousing?

I have a new bellhousing sitting in the shed. How accurate do you need the measurements. All I have to measure with is a 600mm metal ruler

Originally Posted by Dougal

Can anyone give me the bolt pattern on the LT95 bellhousing?

Originally Posted by 130 ambulance

Thanks isuzu rover... It's all starting to make sense

Now I think I'm starting to get it So if I go with the LT95A box with a 0.996 ratio It will actually be higher in 4th than the 5th in my current set up of 5 speed LT85/230TC 1.4:1 Meaning i'm going to move just as quick with out over revving the engine and I really wont miss the fifth gear at all. Next question i have is.... Will having a military salisbury rear diff cause any problems with gearing that I should be aware of.

It is easy to work out overall ratios.

Just gear ratio x tcase ratio x diff ratio.

So your current setup in 5th would be 0.77(?) x 1.4 x 3.54 = 3.81
Doing the same for the LT95 in 4th = 3.53 - so slightly taller.

Not sure what you mean by a "Military" salisbury. OZ or Canadian? Series or coiller? 4x4 or 6x6?

All series salisburies were 4.7:1 - with the exception of Stage 1 V8s (3.54:1)
All coillers were 3.54:1 - except 6x6s (4.7:1)
FC101s are 5.57:1

Dana 60 ratios can be fitted. Gives you the option of anything from 3.54:1 to 7.17:1