What type of tranny do I have?
11-06-2006, 07:03 AM
#1
Junior Member
Thread Starter
iTrader: (1)
Join Date: Oct 2006
Location: Detroit, Maine
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
What type of tranny do I have?
I have a 1986 firebird that I pulled the motor and tranny of, now that I have the tranny out how do I tell what type of tranny it is. I want to put a 350 in it with a 700r4. How do I tell if the one I have already isn't a 700r4?
11-06-2006, 07:42 AM
#4
Junior Member
Thread Starter
iTrader: (1)
Join Date: Oct 2006
Location: Detroit, Maine
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
These are some quick pictures I got for now where the engine and tranny are in the back of my truck. I hope this helps, if not I'll get better ones later today. I'm pretty sure it has overdrive, oh and it is marked MD8 on the side. Thanks.
11-06-2006, 09:49 AM
#5
Junior Member
Thread Starter
iTrader: (1)
Join Date: Oct 2006
Location: Detroit, Maine
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
After doing some research on the internet, it looks like is a th700-r4. RPO code MD8, ID # 6yxm142b. Can anyone give me anymore information on it?
11-06-2006, 01:21 PM
#6
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
it's a 700r, but it appears to be an older truck model.
- I can't see the casting "rainbow" tell-tale for it to be the later model(but it's hard to tell through the grime), and it appears to have the large bolt holes for the aluminum converter cover, thus making it the truck case.
- The truck case would be a good thing, but if it's the early model 700, it won't hold as much power.
clean off the area behind/around the dipstick tube and see if it has a "rainbow" casting line on the case
- I can't see the casting "rainbow" tell-tale for it to be the later model(but it's hard to tell through the grime), and it appears to have the large bolt holes for the aluminum converter cover, thus making it the truck case.
- The truck case would be a good thing, but if it's the early model 700, it won't hold as much power.
clean off the area behind/around the dipstick tube and see if it has a "rainbow" casting line on the case
11-06-2006, 05:18 PM
#7
Moderator
Join Date: Aug 2004
Location: Nanticoke, Pa
Posts: 1,367
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Firebird
Engine: 406 CI
Transmission: Pete K 700R4
Axle/Gears: 3:55
6 1986
yxm 2.8 liter multiport f-body
142 is the julien date it was built
b built during the first shift of the day
Trending Topics
11-07-2006, 01:48 PM
#8
Supreme Member
Join Date: Apr 2002
Location: Southwest Florida
Posts: 4,627
Likes: 0
Received 2 Likes
on
2 Posts
Car: projects.......
The code breaks down to:
6 1986
yxm 2.8 liter multiport f-body
142 is the julien date it was built
b built during the first shift of the day
6 1986
yxm 2.8 liter multiport f-body
142 is the julien date it was built
b built during the first shift of the day
08-04-2007, 07:04 PM
#9
Junior Member
Join Date: Nov 2006
Location: Spearfish, South Dakota
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1939 Graham or 1981 Avanti
Engine: 429 Ford + 400 GM
Transmission: C6 and 1981 GM
Axle/Gears: 2.75 + 3.43 Dana
Re: What type of tranny do I have?
MD8 means it is a 4L60 - a later model version of the 700 R4. It will NOT mate with a 350. The 4L60 is a trans in high demand since it mates with the 2.8 and the boosted versions, 3.1, 3.4 so you should be able to either swap it for a 700 R4 from a 350 or sell it and buy a 700 R4 from a 350. Good luck!
08-04-2007, 11:34 PM
#10
Supreme Member
iTrader: (2)
Join Date: Feb 2006
Location: 39.84N 105.11W
Posts: 1,547
Likes: 0
Received 0 Likes
on
0 Posts
Car: '89 Trans Am GTA
Engine: WAS 350 - now L92 (alum. 378/6.2L)
Transmission: WAS 700R4, now a built T56
Axle/Gears: 3.27 9-bolt
Re: What type of tranny do I have?
Originally Posted by Spearfishkid
MD8 means it is a 4L60 - a later model version of the 700 R4. It will NOT mate with a 350.
Thread
Thread Starter
Forum
Replies
Last Post
TinnMann2
Canadian Region
16
06-18-2017 05:10 PM
