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3.0 gearbox into 3.1 engine


 
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marin5451
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Joined: 05 Jan 2013
Posts: 7
Location: London

PostPosted: Mon Jul 07, 2014 10:10    Post subject: 3.0 gearbox into 3.1 engine Reply with quote

Hi everyone,
I have an ISUZU 3.0 auto, i rebuilt the engine, as the trust washer was gone, hopping that will ok, only 67k mls.
I bought an 3.1 manual and converted the 3.0 completely with gearbox, drivetrain and wire harness with speedo.
Everything works as should like was on 3.1.
I'm doing a lot of motorway miles, and the 3.1 gearbox it's slower than 3.0.
At 2000 rev i have 50m/h, on 3.0 at 2000rev i headed 70m/h.
Can anyone suggest me if i will fit 3.0 manual gearbox and flywheel with clutch will be my trooper faster on motorway?
I had the 3.0 turbo fitted into 3.1 so i have more power.
Thank you in advance.
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PostPosted: Mon Jul 07, 2014 10:10    Post subject: Google Ads keep this community free to join!


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Gribble
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Joined: 11 Oct 2007
Posts: 8448
Location: Holset H221W

PostPosted: Mon Jul 07, 2014 10:58    Post subject: Reply with quote

I think but not 100% sure the box ratios are the same at 0.788/1 in 5th gear,not sure about the T/box though  and the 3.0 auto diff is a higher ratio than the manual one (4.1 and 4.3) so you should be going a bit faster !

To check turn the engine over once in 4th gear and the prop should go round once too ,I say 4th as it will check the T/box ratios too as its 1/1 ratio .

Wilky , might be something you know a bit about like ?
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marin5451
Newbie


Joined: 05 Jan 2013
Posts: 7
Location: London

PostPosted: Mon Jul 07, 2014 11:35    Post subject: Reply with quote

Thanks Gribble,
I will try that as the 3.0 gearbox it's on the floor.
I'm just wandering if i'l swapped how to make 4WD work as all my wire harness are from 3.1 now.
Thanks for that.
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pugbug
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Joined: 24 May 2012
Posts: 263
Location: Leicester

PostPosted: Sat Jul 12, 2014 18:05    Post subject: Reply with quote

How have you put the 3.0 turbo on the 3.1?

The flanges are different, the 3.0 has a triangluar one and the 3.1 a square one, I tried swappin the housings over, but the 3.1 exhaust housing is a misfit on the 3.0 turbo.
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