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Old 11-23-2010, 08:34 PM   #11
Bus Crazy
Join Date: Oct 2004
Location: New England
Posts: 1,009
Year: 1993
Coachwork: Ward Genesis
Chassis: International
Engine: DT466/MT643
Rated Cap: 77
Re: Rear end 1990P-30 Diesel

Very important question: what transmission do you have? 1990 could be a TH475 or the 4L80E overdrive. Without OD...realistically, you are looking at cruising at 55MPH, tops, even after a swap to 4.56 gears.

Personally, I'd keep the 5.13's and replace the TH475 with a built TH-700 overdrive automatic.
Optimism is a mental disorder.
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Old 02-02-2011, 07:28 PM   #12
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Join Date: Sep 2009
Location: Jacksonville,Florida
Posts: 7
Year: 1990
Coachwork: Bluebird
Chassis: Chevy P30
Engine: 6.2 chevy diesel
Re: Rear end 1990P-30 Diesel

Thanks for your suggetion.
I have a question on the tranny swap to a different one.
If I can locate a good TH-475or a TH-700 how hard is it gonna be to get it fit to the motor?
Also it is the same lenght so it can be just replaced with one?
There is adapters for it if needed?
Sorry for all the Q?'s,but I'm new the the whole schooli world and would love to put my bus back to the road for the spring-summer.
Thanks in advance.
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