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#1 |
Registered User
Join Date: Sep 2003
Location: Venedy, IL
Posts: 25
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transfer case questions
Hi guys, I just bought a 700R4 tranny and transfer case out of a 88 chevy 1/2 ton. I'd like to put the tranny in my 70 blazer. I'm guessing the transfer case won't work, the front output appears to be on the wrong side. What transfer case can I use for this application? Anyone have anything available near southern Illinois? Thanks, Willie
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1970 Blazer CST 350 700R4 |
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#2 |
Recovering 67-72 Addict
![]() Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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You can use an NP205 transfer case with a TH350 adapter and an Advance Adapters shaft in the 700R4. Do a search. This conversion has alot of coverage.
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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#3 |
Registered User
Join Date: Sep 2003
Location: Venedy, IL
Posts: 25
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Thanks Breeh, I used the search feature and got a lot of good info on the 205. That route seems like it will be pretty expensive. Can you bolt up a 208 to this tranny and use it in the blazer? I've heard they were weak though, is that something I should stay away from? Willie
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1970 Blazer CST 350 700R4 |
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#4 |
Recovering 67-72 Addict
![]() Join Date: Oct 2000
Location: North Bend, WA
Posts: 1,788
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I really don't know anything about the 208 case other than it is a chain drive case and is not as strong as the 205 which is gear driven.
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68 Short Fleet 4x4; 427; BTO Level 3 700R4; NP205; Dana 60 front and rear; 4" lift with 35's; Disc brakes; AGR variable ratio steering; factory bucket seats; factory tach and tilt. "Friends call me cruzer cuz I like fast cars and fast women" |
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#5 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
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I converted my 3-on-the-tree/NP205 4x4 to a TH350/NP205. In my narrow little mind it was the best move I've ever made with this truck. When doing the conversion I decided NOT to go with a 700r4 because I mostly tow with this vehicle and since you shouldn't tow in overdrive with that transmission I went with the th350.
It has been two years or better now and I've had a lot of time to think about it. And drive it. Now I wish I would have went with the 700r4. A lot of people think they are weaker and the first couple of years they were. However if you tow only in drive, and don't have a fire breathing big block in front of it, it should last as long as a th350. Not to mention in a truck like mine with 373 rear end gears it probably will extend the life of the engine by keeping it at lower rpms on the highway. I wish I would have gone overdrive so bad I recently bought a 700r4 core. When I get the advanced adapters output shaft I'll take it and the tranny to a well regarded rebuilder, have it rebuilt, and get it in there. To make a long story short your Blazer probably already has the NP205. Suck it up, buy the advanced adapter output shaft, and do it right the first time. I wish I did.
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'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
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#6 |
Registered User
Join Date: Sep 2003
Location: Venedy, IL
Posts: 25
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Thanks for the responses fellas I wish it were simple as converting my 205 but that's not the case. For some reason (which no one can explain) my factory 4 spd came with a Dana 20 transfer case. The transfer case broke the rear output shaft so that led me to opt to put an automatic in. I guess I will have to find a auto 205 with its shifter and adapter and go that route. Does anyone know if a 208 will bolt right up to my 700R4? That would be the other option I guess. If anyone else has any suggestions feel free to contribute, I think I'm going to call my local 4x4 shop tommorow and see what he has to say. Thanks again, Willie
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1970 Blazer CST 350 700R4 |
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#7 |
" SHOW ME"
Join Date: Jan 2003
Location: shelbyville illinois
Posts: 2,624
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i would pesonally say as far away as possible from the 208.. just my thoughts,, at least a 203 if nothin else,, by the way ,,imin shelbyvile illinois,, which part are you from ?
Mac |
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#8 |
Registered User
Join Date: Sep 2003
Location: Venedy, IL
Posts: 25
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I'm from out in the country near Venedy, or Okawville Illinois. I don't know if I'll go for a 208 or not, I'm just trying to get my Blazer back together and save some $. ---- Willie
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1970 Blazer CST 350 700R4 |
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