700r4 Year ID
#1
Junior Member
Thread Starter
Join Date: Jun 2006
Location: Milwaukee, WI
Posts: 91
Likes: 0
Received 1 Like
on
1 Post
Car: 1985 Berlinetta
Engine: 5.0 LG4
Transmission: 700R4
Axle/Gears: 3.08 Peg Leg
700r4 Year ID
I've read all the articles that explain why '87-later 700r4's hold up better. I even have personal experience with my own junk breaking down.
But nothing I've read explains how to ID (externally) a later date tranny.
Casting codes? Type of pan bolts? Number of splines? Alien markings?
But nothing I've read explains how to ID (externally) a later date tranny.
Casting codes? Type of pan bolts? Number of splines? Alien markings?
#2
Senior Member
iTrader: (4)
Join Date: Mar 2007
Location: Tallahassee, Florida
Posts: 860
Likes: 0
Received 0 Likes
on
0 Posts
Car: '86 Trans Am and '03 S-10
Engine: 355ci and 4.3l
Transmission: 700R4 and NV3500
Axle/Gears: 7.625/3.42 Auburn and 8.5/3.08 Gov-
Re: 700r4 Year ID
82-84 1/2 had 27 splines and anything after had 30 splines. Easiest way to tell if its a 87 or later is drop the pan and look for the auxillary valve body. But the best way is to get the ID off of it. If its a 82-84 the ID liiks similat to this ( 9 TA Y 0 M 12 N ) , if its a 85-86 the ID looks like this ( 6 MD 146 A ) , if its a 87-88 the ID looks like this ( 7 YK M Y 45335678-141 A ) and if its a 89-Later the ID looks like this ( 2 YD M 2 145 C ) . These series of #s all mean something as far as year, model, build date, etc. On the 85/86, 87/88 and 89/on the 1st digit it the model year. As in 85/86 the 6 is 86 and 5 is 85. On the 87/88 its the same. Also the 88 and later it is as well. Being a 1 is a 91, a 8 is an 88, and so on. Since the models stretched over a long period of time, you need to ID the year series 1st by the ID type. Notice how different each is. There is also a model code (MD) on the 85/86 sample and YK on the 87/88 sample, that will tell you more about it.
#4
Member
Join Date: Jul 2005
Location: North Carolina(but you'll never take the DC out of me!!!)
Posts: 186
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 Formula,'02 Silverado,'15 200s
Engine: L98, LQ4, and 3.6 Pentastar
Transmission: 4L60/4L80E/9HP48
Axle/Gears: 2.73posi/3.73posi/3.73
Re: 700r4 Year ID
Also the last 3 digits of the pump serial # on 88-up 700's should be 732.
That indicates that it's a 10 vane pump, used in the 88 and later trannies.
I read about that elsewhere in this forum but I can't remember where.
That indicates that it's a 10 vane pump, used in the 88 and later trannies.
I read about that elsewhere in this forum but I can't remember where.
#5
Senior Member
iTrader: (4)
Join Date: Mar 2007
Location: Tallahassee, Florida
Posts: 860
Likes: 0
Received 0 Likes
on
0 Posts
Car: '86 Trans Am and '03 S-10
Engine: 355ci and 4.3l
Transmission: 700R4 and NV3500
Axle/Gears: 7.625/3.42 Auburn and 8.5/3.08 Gov-
Re: 700r4 Year ID
Good info. Where is the Pump ID? I just pulled my tranny for a rebuild and would like to verify. The casting # on mine is cast big into the front. Its # 8654732. Top right. Also, is there a certain year that used the Double Priming Springs in the pump vs. the Single?
#6
Member
Join Date: Jul 2005
Location: North Carolina(but you'll never take the DC out of me!!!)
Posts: 186
Likes: 0
Received 0 Likes
on
0 Posts
Car: '91 Formula,'02 Silverado,'15 200s
Engine: L98, LQ4, and 3.6 Pentastar
Transmission: 4L60/4L80E/9HP48
Axle/Gears: 2.73posi/3.73posi/3.73
Re: 700r4 Year ID
in 1988, but don't quote me on that.
#7
Junior Member
Thread Starter
Join Date: Jun 2006
Location: Milwaukee, WI
Posts: 91
Likes: 0
Received 1 Like
on
1 Post
Car: 1985 Berlinetta
Engine: 5.0 LG4
Transmission: 700R4
Axle/Gears: 3.08 Peg Leg
Re: 700r4 Year ID
Thanks for the replies; EXACTLY the type of information that I was looking for. I know where I can get what is advertised as an '87, and an '89, but how do I know for sure?
Thanks again.
Thanks again.
Trending Topics
#8
Senior Member
iTrader: (4)
Join Date: Mar 2007
Location: Tallahassee, Florida
Posts: 860
Likes: 0
Received 0 Likes
on
0 Posts
Car: '86 Trans Am and '03 S-10
Engine: 355ci and 4.3l
Transmission: 700R4 and NV3500
Axle/Gears: 7.625/3.42 Auburn and 8.5/3.08 Gov-
Re: 700r4 Year ID
I just read something about the 732 at the end being a late model pump. Also found mine to have the correct Aux VB port, the larger hole (.215") between the sealing rings which should make it a late 87-92 according to ATSG. I am guessing the double springs are present. I also found my Tranny ID is 91( I already knew) but that I have a VBody with the extra Converter Clutch Valve Port. IDK if the 91 had it (wouldnt think so) or weather the last tranny builder put it in there from a 87 model since I had no-ECM to control lockup. Im stumped on that...ANY INPUT? The spacer is a (EA) ID and OEM part # 8680144. That corresponds with 1991 and the model code from my tranny ID KWM. Im getting a new spacer plate tomorrow from Superior. This ones seen better days.
#9
Supreme Member
iTrader: (2)
Join Date: Jan 2005
Location: Hurst, Texas
Posts: 9,969
Received 379 Likes
on
323 Posts
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: 700r4 Year ID
The improved 700r4s also have an extra rib added externally, near the 2-4 servo. It started in 1987 and is was still being used on the last 4L60E I looked at. It starts near the bellhousing, goes up and right to the servo, the down toward the pan rail. It is a raised peak cast into the casting, looks like a hill, with its base starting at the pan rail. I will post pictures tomorrow to show the difference.
The following users liked this post:
maroe624 (12-15-2019)
Thread
Thread Starter
Forum
Replies
Last Post
Thornburg
Transmissions and Drivetrain
10
08-25-2015 01:46 AM