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04-10-2013, 05:46 PM
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#1 |
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Registered User
Join Date: Aug 2011
Location: South Texas
Posts: 16
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what transmission do I have?
Whats up everyone! I have an 81 c10 longbed with a 350 engine but don't know what type of transmission I have all I can see on the side is 4T...what does it mean?.alsothis is a 3 speed only if it helps and is not electric is vaccum. I want a 700R 4 speed for the highway...is the swap fairly easy and what other obstacle will I find. I can't seem to post a pic thru my phone...darn it
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04-10-2013, 07:12 PM
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#2 |
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Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: what transmission do I have?
take a look at your pan and match to one in this diagram
__________________
2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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04-10-2013, 07:26 PM
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#3 |
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Registered User
Join Date: Apr 2013
Location: Baskin
Posts: 73
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Re: what transmission do I have?
As far as the swap, depending on which tailshaft you currently have, you may need a new drive shaft. With the 700 you will need a detent cable and either a vacuum switch for the torque converter lockup or switch, depending on which style you use. You will also need a new gear indicator for your gauge cluster. You will also need new transmission mounts and possibly have to move/modify your crossmember.
__________________
V.P. of The American Squarebody Association. 1982 Sierra, 555 BBC, All Billet 700R4, Fab9 with 4.11's, Full 8.5 cert cage, 31x18x20 MT Sportsman S/R's on custom made 20x15 Amer. Racing Hopsters, 4-link with anti-roll bar and dual adj coilovers, Front drag shocks, Custom interior, and quite a bit more. |
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04-10-2013, 08:49 PM
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#4 |
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Watch out for your cornhole !
 
Join Date: Jun 2003
Location: Azle, Texas
Posts: 14,162
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Re: what transmission do I have?
If your turbo 350 is a 9 inch tail shaft the driveshaft and yoke will work without mods.
You can reuse the th350 mount on the 700r4 but you will need metric bolts to mount it to the trans. You'll need to move the crossmember. Shift linkage and cooler lines will work. Figure out which method you want to use for torque converter lockup control and tv cable mounting. You can use GM stuff from a 700r4 truck or aftermarket, your choice. Remove the vacuum line for the th350 and plug the bib on the manifold. Posted via Mobile Device |
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04-11-2013, 11:26 PM
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#5 |
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Registered User
Join Date: Aug 2011
Location: South Texas
Posts: 16
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Re: what transmission do I have?
Thttps://fbcdn-photos-f-a.akamaihd.ne...26784344_n.jpghanks to all.....Ill check this on my truck. Ill get back with this info soon
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04-20-2013, 06:21 AM
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#6 |
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Registered User
Join Date: Aug 2011
Location: South Texas
Posts: 16
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Re: what transmission do I have?
Yes sir I have the TH350 for sure. Good transmision but I travel on the highway most of the time and I'm needing this overdrive tranny on the truck....
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04-20-2013, 09:03 AM
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#7 |
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Registered User
Join Date: Mar 2012
Location: stafford springs ct
Posts: 149
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Re: what transmission do I have?
you're in luck, it's a real easy swap from a th350 to a 700r. just follow tx firefighter's advise and you're on the way. i did the same thing to my '80 c10.
__________________
1977 srw cc lb 396/700r/4:11's/6'' bds lift/ 35's. sold 1986 suburban 350/700r/3:73's 31's: parted out. 1980 silverado swb 5.3/700r/ 2'' drop/ daily driver. sold 1985 c10 long bed 5.3/700r/2'' drop/17" wheels/ daily driver. sold 1970 c10 long bed-new project! getting ready for the 6.0 |
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