Jagarang
07-14-2005, 04:57 AM
Well....caveat number 16,678,859 when building a Pontiac!
I'm looking to install a 2002 4L80E to the back of my 1971 455 Pontiac motor. I have researched a bit and I believe that the TH400 adapters are the same, but would like collect opinions and suggestions from my PT family regarding the highest quality unit, and any installation issues I might encounter!
I found thess adapters...
http://www.transmissionadapters.com/late_bpoc.htm
Coan Racing..
Coan Racing (http://www.coanracing.com/PDFS/InstallInstructions/COA-980073.pdf)
On a side note, I just read that I'll need a different tail section to work with my mechanical speedo??
There's yet another problem you'll encounter when retrofitting one of these sleek puppies into your non-computer controlled car. The speedo. These transmissions were designed to ONLY work with an electronic speedo. So, you have two choices: convert to an electronic speedometer (apparently over $800 according to CC) or you can get an extension housing for the 4L80E from Art Carr (part No. 17925 - $395) which allows the use of conventional TH-400 speedo gears and cable. Carr also has performance 4L80E converters available
Any help on this idea is also needed.
This is getting complicated!
What about transmisssion tunnel modifications? Frank says the 4L80E bellhousing looks significantly chunkier than either the TH-2004R or TH-400 that were previously destined for the car.
Thanks in advance guys!
I'm looking to install a 2002 4L80E to the back of my 1971 455 Pontiac motor. I have researched a bit and I believe that the TH400 adapters are the same, but would like collect opinions and suggestions from my PT family regarding the highest quality unit, and any installation issues I might encounter!
I found thess adapters...
http://www.transmissionadapters.com/late_bpoc.htm
Coan Racing..
Coan Racing (http://www.coanracing.com/PDFS/InstallInstructions/COA-980073.pdf)
On a side note, I just read that I'll need a different tail section to work with my mechanical speedo??
There's yet another problem you'll encounter when retrofitting one of these sleek puppies into your non-computer controlled car. The speedo. These transmissions were designed to ONLY work with an electronic speedo. So, you have two choices: convert to an electronic speedometer (apparently over $800 according to CC) or you can get an extension housing for the 4L80E from Art Carr (part No. 17925 - $395) which allows the use of conventional TH-400 speedo gears and cable. Carr also has performance 4L80E converters available
Any help on this idea is also needed.
This is getting complicated!
What about transmisssion tunnel modifications? Frank says the 4L80E bellhousing looks significantly chunkier than either the TH-2004R or TH-400 that were previously destined for the car.
Thanks in advance guys!