which trans ? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 4 (permalink) Old 12-10-2007, 12:12 PM Thread Starter
 
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which trans ?

on my quest to install a 6.2 in my 93 astro i am having a hard time choosing a transmission the current trans in the van is a 4l60e i also have a 700r4 trans but what i think i am understanding i cant use either trans because they are for a 4.3 gas engine so what are my choices from here i dont tow anything and most of my driving is highway any info would be appreciated thanks
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post #2 of 4 (permalink) Old 12-10-2007, 11:20 PM
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The 4.3 trans will bolt. The 4L60 and 700R4 are practically the same trans, other than a few electronic controls. The only concern using the 4.3 trans is the lack of holding power from not using as many clutches, otherwise, they would work ok. The other problem is the converter stall speed. Diesels stall at lower rpm's than gassers, but if you don't mind a little wind, it would work. Gasser tend to stall at about 1200, I don't know the spec of the diesel stall though.

The workhorse: 86 F250 6.9 4 speed 4wd 4.10 gears, electric fuel pump
The other workhorse: 92 F350 2wd crew cab, 92 6BT Cummins, NV4500 and GV overdrive unit, 4.10 rear axle
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post #3 of 4 (permalink) Old 12-11-2007, 09:52 PM Thread Starter
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so there is no different between a gas trans and a diesel trans except for the torque convertor ?
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post #4 of 4 (permalink) Old 12-11-2007, 11:57 PM
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In essence, no, however a friend of mine recently ran into a funny thing, a gas trans had a heavier duty input than the diesel trans he took out, so that is a possibility to run into, but they will bolt and work going both ways. The internals are the same generally.

The workhorse: 86 F250 6.9 4 speed 4wd 4.10 gears, electric fuel pump
The other workhorse: 92 F350 2wd crew cab, 92 6BT Cummins, NV4500 and GV overdrive unit, 4.10 rear axle
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