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Old April 17th, 2011, 11:16 PM   #1
Carbon
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Default What transmission

I just pulled out my 700r4 trans from my 88 gmc 1500 thinking I had a spare. Come to find out I don't. Does anyone have a list of transmissions I can use that will bolt up? Opinions on what to put in. The truck is a mud truck so overdrive is not needed. Would like something strong and reliable.

Also if anyone is looking for a 4L60e I would be willing to trade that for something I could use.
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Old April 18th, 2011, 07:26 AM   #2
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your pretty much stuck with using another 700r4 unless u wanna change a few things. a th350 will work if u get the correct crossmember, t-case adapter, as well as correct length driveshafts. imo not worth the time or money when u can swap in the right trans and be done.
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Old April 18th, 2011, 08:43 AM   #3
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I can Fab up a cross member I'm sure. What's the drive shaft length difference? What is different about the adapter? Sorry for the ignorance but I don't see why doing a little extra work and a few extra dollars for a stronger transmission is not worth it.
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Old April 18th, 2011, 08:43 AM   #4
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Quote:
Originally Posted by Kodiak450r View Post
your pretty much stuck with using another 700r4 unless u wanna change a few things. a th350 will work if u get the correct crossmember, t-case adapter, as well as correct length driveshafts. imo not worth the time or money when u can swap in the right trans and be done.
except with an overdrive transmission you've got more rotating weight, you lose more power, the 700r4 has alot of issues with strength.

th-350 is a solid transmission.
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Old April 18th, 2011, 08:46 AM   #5
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Now what about a th 400?
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Old April 18th, 2011, 08:51 AM   #6
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buy this kit to put a th350 coupled to the stock 241 t-case. http://www.advanceadapters.com/products/pn-50-7100/
or this kit if u pick up a th400 http://www.advanceadapters.com/products/pn-50-7000/
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Old April 18th, 2011, 08:55 AM   #7
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Originally Posted by skife View Post
except with an overdrive transmission you've got more rotating weight, you lose more power, the 700r4 has alot of issues with strength.

th-350 is a solid transmission.
the weight difference is trivial in a mud truck. th700r4 weighs 155 lbs, th350 weighs 120 lbs and a th400 weighs 135 lbs. the th400 has a higher horsepower loss compared to a th350 or a th700r4. a th700r4 can be built to handle high horsepower very easily and without much cost. my 700 was built to handle about 450 HP and it cost 900 bucks through tranny tom parts and labor.
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Old April 18th, 2011, 11:06 AM   #8
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There are versions of the TH350 that can drop right in place of the 700R4. In fact, I just yesterday removed that output shaft and spacer (goes on the tail housing before the t-case adapter), and made mine back into a stock 4wd TH350.

You wouldn't need any driveshaft mods then. The trans mount holes might be off by about 2 inch or so.

If you wanted to find those parts, I have the spacer block, Tranny tom has the old shaft.
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Old April 18th, 2011, 11:29 AM   #9
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I just need to get something installed and running. I'm just having a hard time finding a 700r4. I just need something to bolt in there.
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Old April 18th, 2011, 11:46 AM   #10
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What trans will bolt right up to my 241c?
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