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10-02-2000, 07:18 PM
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#1 |
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Registered User
Join Date: Jun 2000
Location: boise, id
Posts: 8
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Transmission question
Can anyone tell me the difference between a TH400 and TH350. Is one better than the other? I am going to be putting a 350 in a 85 1/2 ton that currently has a V6 with the TH400.
Any thoughts would be appreciated. Thanks, Kerwin |
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10-03-2000, 07:00 PM
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#2 |
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Registered User
Join Date: Mar 2000
Location: Midwest City, OK
Posts: 51
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I think the TH400 is supposed to be stronger than the TH350. Is the v-6 stock? A weird combo!
------------------ 1987 1/2 Ton Silverado, 350, 454 TBI unit w/ injector spacers, ADS Superchip, K&N air filter, Terminator muffler, 700R4, 3.08 gears .... come and see it at 87Chevy'sTruckinPage
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1987 1/2 Ton Silverado, 350, 454 TBI unit w/ injector spacers, ADS Superchip, K&N air filter, Terminator muffler, 700R4, 3.08 gears .... come and see it at 87Chevy'sTruckinPage |
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10-03-2000, 07:31 PM
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#3 |
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Registered User
Join Date: Jun 2000
Location: boise, id
Posts: 8
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Yes, as far as I know the V6 is original, it's in a 1985 GMC. I think it's the TH400 trans, I'm going by what the pan looks like and the modulator on the side. Unless it is possibly something else??
Thanks, Kerwin |
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10-03-2000, 10:11 PM
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#4 |
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You get what you pay for
 
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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It's a 700R4. It's an overdrive tranny, right? If it's a square pan, it's a 700R4.
No 85 1/2 tons came with V-6's and TH400's. The auto options were TH350C's 3 speed, and 700R4's 4 speed. Keep the 700R4 with the 350. A great combo. Of course the 85 700 is not as good as the later years. Mine went out and I replaced it with one from a 89. The mid 88 thru 92's are the best years. ------------------ Mike 1985 Chevy C-10 Mike's 73-87 Chevy Pickup Site [This message has been edited by swervin ervin (edited 10-03-2000).]
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Mike 1985 Chevy C-10 |
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10-04-2000, 05:49 AM
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#5 |
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Senior Member
 Join Date: Jun 2000
Location: georgia
Posts: 292
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A 700R4 wouldn't have a modulator on it.Also what size V6,the bell housing is different on a 2.8 V6. The 4.3 V6 is the same as a V8.
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10-04-2000, 05:47 PM
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#6 |
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You get what you pay for
Join Date: Dec 1999
Location: Cherryville, NC
Posts: 4,798
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There were no 2.8 V-6's in 85 C-10's. If it is a V-6, it is a 4.3, so the tranny will fit a V-8.
------------------ Mike 1985 Chevy C-10 Mike's 73-87 Chevy Pickup Site [This message has been edited by swervin ervin (edited 10-04-2000).]
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Mike 1985 Chevy C-10 |
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10-05-2000, 10:35 PM
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#7 |
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Registered User
Join Date: Sep 2000
Location: East TN
Posts: 294
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Well I don't know what in the crap came on who in whichever year. Your question was which is better the 400 or the 350. Well, the 400 is a 'ell of a lot tougher transmission. I used mine for heavy pullin' and well, I ate up the 350's two of 'em as a matter of fact. So I had a 400 built, and now I spent some cash on her, but she never skipped a beat, and was runnin' strong when I sold her. The 400 was a great transmission, the 350 was very weak, of course thats just my experience. Mine was in '78 GMC swb, 4x4. I used mine for a little fun, and a lot of heavy hauling.
Hope this helps See ya' ------------------ 1967 K-10, swb,4sp 4wd, power nothin'.....man is she in need of lots of help!! [This message has been edited by Hawk (edited 10-05-2000).]
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Cab on the frame..............one step ata' time folks. Bristol, TN 67 K10 swb, fleetside |
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