please help tranny trouble

aprilfreak2 · 09-29-2009, 08:09 AM

my boyfriend just bought a 93 chevy silverado they changed tranny because u had to manully shift it. but after changing it u still have to. we talked to a guy who rebuilds tranny and he said if the speed op. don't work it won't shift right. can anyone help we can't figure out to fix the speed op. they tried everything they have thought of.

mtsnieg · 09-29-2009, 11:43 AM

Is your truck 2wd or 4wd? Does your speedometer work? Do you know what tranny you have? Need a bit more informaton.

aprilfreak2 · 09-29-2009, 12:49 PM

2wd no the speedometer don't work. that is what i meant. they checked the fuses and some kind of box in the dash. 4l60 trans. the tranny is out of a 99 chevy. we changed the tail shaft but it still didn't work.

Crmzendrgone · 09-29-2009, 01:39 PM

I would think that the 99 is a 4L60E. I believe that needs a computer to run it. I think 93 was still a 4L60 no E for Electronic.

aprilfreak2 · 09-29-2009, 01:56 PM

thanks for the help

1500cheyenne96 · 09-29-2009, 02:04 PM

X2 on that you can't put a 4L60E(94-??) into a 4L60 truck(91-93 it think) especially if the trans came out of a 99 the electronics are worlds apart. Sounds like your gonna have to find a trans outta a 4L60 truck or a older vacuum controlled 700R4 will work as long as the speed sensor in the housing is compatible with the wiring on the truck

BernieB · 09-29-2009, 02:04 PM

You're right Dragon... Can't put a 99 tranny in a 93 and expect it to work without the PCM.

aprilfreak2 · 09-29-2009, 02:08 PM

so if i get the computer out of the newer truck and the motor is the same will it work then

BernieB · 09-29-2009, 02:12 PM

Quote:

Originally Posted by aprilfreak2

so if i get the computer out of the newer truck and the motor is the same will it work then

It's not quite that simple... The PCM is going to need inputs that your 93 just isn't built to give it.

1500cheyenne96 · 09-29-2009, 02:20 PM

No more than likely I don't think the trans will work with out the engine out of a 99 or later and the PCM. Because you truck being a throttle body injection truck and starting in 96 they went to full sequential fuel injection I don't think even if you got the PCM the trans provably still wouldn't work because those PCM's have specific programing the read engine rpm's engine load vehicle speed and so on and so forth to decide when to shift up, down and lock the torque converter. Basically what bernie said

09-29-2009, 08:09 AM	#1
aprilfreak2 Junior Member Join Date: Sep 2009 Posts: 7	please help tranny trouble my boyfriend just bought a 93 chevy silverado they changed tranny because u had to manully shift it. but after changing it u still have to. we talked to a guy who rebuilds tranny and he said if the speed op. don't work it won't shift right. can anyone help we can't figure out to fix the speed op. they tried everything they have thought of.

09-29-2009, 11:43 AM	#2
mtsnieg Senior Member Join Date: Feb 2009 Location: Okauchee, WI Posts: 60	Is your truck 2wd or 4wd? Does your speedometer work? Do you know what tranny you have? Need a bit more informaton. __________________ '94 Chevy Silverado Z71 Xtra cab 4x4 350cid 4l60e auto

09-29-2009, 01:39 PM	#4
Crmzendrgone Senior Member Join Date: Apr 2009 Location: Arizona Posts: 1,420	I would think that the 99 is a 4L60E. I believe that needs a computer to run it. I think 93 was still a 4L60 no E for Electronic. __________________ ENGINES PRODUCE POWER. MOTORS RECEIVE POWER. https://lastroundbestround.com/Home_Page.html

09-29-2009, 02:04 PM	#7
BernieB Senior Member Join Date: Jul 2009 Location: Fredericksburg, VA Posts: 1,901	You're right Dragon... Can't put a 99 tranny in a 93 and expect it to work without the PCM. __________________ If the guys who design 'em had to take one home, use it every day for 2 years, and do all the maint and repairs themselves, cars would have a button on the dash to change the oil, filters & plugs.

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09-29-2009, 12:49 PM	#3
aprilfreak2 Junior Member Join Date: Sep 2009 Posts: 7	2wd no the speedometer don't work. that is what i meant. they checked the fuses and some kind of box in the dash. 4l60 trans. the tranny is out of a 99 chevy. we changed the tail shaft but it still didn't work.

09-29-2009, 01:56 PM	#5
aprilfreak2 Junior Member Join Date: Sep 2009 Posts: 7	thanks for the help

09-29-2009, 02:04 PM	#6
1500cheyenne96 Senior Member Join Date: Sep 2009 Location: MIchigan Posts: 195	X2 on that you can't put a 4L60E(94-??) into a 4L60 truck(91-93 it think) especially if the trans came out of a 99 the electronics are worlds apart. Sounds like your gonna have to find a trans outta a 4L60 truck or a older vacuum controlled 700R4 will work as long as the speed sensor in the housing is compatible with the wiring on the truck

09-29-2009, 02:08 PM	#8
aprilfreak2 Junior Member Join Date: Sep 2009 Posts: 7	so if i get the computer out of the newer truck and the motor is the same will it work then

09-29-2009, 02:20 PM	#10
1500cheyenne96 Senior Member Join Date: Sep 2009 Location: MIchigan Posts: 195	No more than likely I don't think the trans will work with out the engine out of a 99 or later and the PCM. Because you truck being a throttle body injection truck and starting in 96 they went to full sequential fuel injection I don't think even if you got the PCM the trans provably still wouldn't work because those PCM's have specific programing the read engine rpm's engine load vehicle speed and so on and so forth to decide when to shift up, down and lock the torque converter. Basically what bernie said

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