1991 Chevrolet S-10 engine and transmission

CREEPERNANA

MEMBER
1991 CHEVROLET S-10
4.3L
V6
2WD
AUTOMATIC
184,000 MILES

Will a gm 5l50 or 6l50 transmission fit a gm 4.3l v6 engine?

Sunday, May 31st, 2015 AT 8:25 AM

5 Replies

HMAC300

MECHANIC
48,601 POSTS

Gm has no 5150 06150 transmissions it's either a 4L60 or 4L80 for your year

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Sunday, May 31st, 2015 AT 10:18 AM

CREEPERNANA

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1 POST

Gm does have a 5L50 transmission as well as a 6L50 transmission. Im asking if they will fit not what transmission came with it.

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Sunday, May 31st, 2015 AT 2:10 PM

HMAC300

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What are they out of as I've never even heard of those model transmissions. And I worked on transmissions in engineering for 20 some years

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Sunday, May 31st, 2015 AT 3:31 PM

HMAC300

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48,601 POSTS

In answer to your question it would have to be same length as well as bolt pattern which means if it came out of a 305/350 it would bolt up however the torque converter would need to be for a 4.3L due to balance otherwise it would shake like heck when running.

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Sunday, May 31st, 2015 AT 3:35 PM

HMAC300

MECHANIC
48,601 POSTS

Correction after looking this model up on line this is a electronic controlled trans which will need a computer to operate it. Yours is obd1 and the 5L50 is OBD2 unless you have a computer for it won't work at all. The model Cadillac that this was used on does not have the same bolt pattern either.