Thread: How long will an L67 last?

is that the original trans? i must know

A couple of people at the Buick Factory 36 (built the 3800 motors) reunion have over 400,000 miles on their original motors and trannies. The 3800's were built "to spec" and the lobby to Factory 36 had a wall full of awards for quality. I've got 280k on my '98 and 178k on my GTP. I'm expecting the bodies will fail before the powertrain does on both cars.

Forever.

Chris..

The motor from Bonnie had 90K when it got the cam/blower. 50K miles later I added heads, IC, rockers etc etc. Did about another 5-10K before I got sick of murdering transmissions. Motor was never an issue, my foot however......that was an issue.

L67 will last 2^20 miles or if turned into a rocket could make it to the moon & back as long as the coolant elbows were changed & the rockers were in good shape.

This is all very good news IMO. I hope to get at least 200k out of my bottom end. Let the modding continue!

Originally Posted by crbquist

This is all very good news IMO. I hope to get at least 200k out of my bottom end. Let the modding continue!

Should be easily obtainable. My turbo GTP just rolled over to 201K. Just maintain it and you are golden.