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Old 04-02-2009, 09:46 PM   #29
mondtster

Name: mondtster
Title: Too Much Time
Status: Not Here
Join Date: Jan 2009
Location: k74
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Posts: 1,206
88-91 had a 3 speed TF727.
91.5-93 had non-lockup A518s
94-95 had lockup 47RHs
96-03 had 47REs
03-07 had 48REs


Quote:
Originally Posted by Polaraco View Post
I Believe the 2nd Gen got the modified 518, while the first gen was a modified 727 with an OD. I think it was a 900 series in a gasser with heavier clutches. That's the only way I know them.
Quote:
Originally Posted by Polaraco View Post
NOw that I think of it. . . . You are right. . .I have CRS forgive me.

In the gasser world. . .

The 900 Series was a 904 or a 727 with a lock up
The 500 Series was a 500 or a 518 with O/D and Lock up

The 900 series was used from 80 to around 88. The 500 series started around 88. Before MPI EFI in the rear wheel drives were out, (88 to 92) the 518 was driven by a separate controller. In 92 it was all done in the engine ECM.

OK so you are right. First Gen was a beefed up 518 with the Lock up removed.
Not quite right there...

The A518, 46RH/RE, 47RH/RE, and 48RE overdrive transmissions are all based off of the TF727.

The A500, 42RH/RE, and 44RH/RE overdrive transmissions are based off of the TF904.

Quote:
Originally Posted by Polaraco View Post
I have a 518 with the diesel guts on the front end, but I can't recall the year they came from. It's stuffed behind my gasser.
There is very little difference between a 518/46rh or re transmission and the heavier duty 47rh/re transmissions. In the front half of the transmission it primarily amounts to differences in the planetary gears which really aren't a problem in most applications IMHO. Clutch count is the same. The OD section of the 47rh/re transmissions do have higher clutch counts however and might be worth considering when building a trans.

Just my $0.02.
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