1970 454 4 speed Reverse issue
Thread Starter
Instructor
Joined: May 2009
Posts: 249
Likes: 0
1970 454 4 speed Reverse issue
Hi Guys..... After 2 weeks up on block stands doing a host of things to the 1970 that I purchased, we took the car out for a test ride very late this afternoon. We've installed new rotors, calipers, brake pads all the way around... as well as front sway bar links etc.... Car went into reverse once.......Pulled out of my driveway.....shifted through all 4 gears....but simply wont go into reverse....only went about 2 miles from home...but a good indicator for us to see what might be wrong.... Would greatly appreciate your opinions on this....
Scratching our heads over this one.....Possibly a bent reverse shift fork or a Gear tooth issue? Tranny number is POE27B..M21 . The car hasnt been really run in a few years...only driven about 10 miles in the last 3 years.... Your comments would surely be appreciated.
Not sure where else to turn at this point.....
Scratching our heads over this one.....Possibly a bent reverse shift fork or a Gear tooth issue? Tranny number is POE27B..M21 . The car hasnt been really run in a few years...only driven about 10 miles in the last 3 years.... Your comments would surely be appreciated.
Not sure where else to turn at this point.....
Limping across the line
Joined: Oct 2002
Posts: 5,299
Likes: 109
From: Peoria Az
Reverse lockout on the shifter is probably out of sorts.
Did you adjust or at least check shifter linkage adjustment while you wwere under the car?
I doubt it's a trans problem if it worked once before without alot of noise.
Did you adjust or at least check shifter linkage adjustment while you wwere under the car?
I doubt it's a trans problem if it worked once before without alot of noise.
Drifting
Joined: May 2008
Posts: 1,647
Likes: 5
From: Roseville CA
Are you able to move the shifter sideways into the reverse gate? If not, the lock out level is not disengaged all the way. If you can get the shifter in the gate, but can't get it into gear, then it might be the tranny. It could also be the linkage if there's not enough travel.
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Le Mans Master
Joined: Jul 2000
Posts: 6,001
Likes: 112
From: Saginaw Michigan
That cable and lever not only locked the transmission in Reverse gear when you removed your ignition key, it also prevented you from locking the steering wheel when your Vette was moving forward. Most likely your problem is a frozen, corroded interlock cable. New ones are available for automatics as well as 4-speeds.
Just so you understand that you can unhook the cable from the steering column and secure the lever in the full UP position. Everything will work just fine - except the engine can be turned off and the steering wheel locked even though you are still moving down the road. GM built the system into all early '70s passenger cars to prevent that from happening.
The paper describes the General Motors Steering Column/Transmission Shift Interlock System.
http://jimshea.corvettefaq.com/?p=928
Jim
Just so you understand that you can unhook the cable from the steering column and secure the lever in the full UP position. Everything will work just fine - except the engine can be turned off and the steering wheel locked even though you are still moving down the road. GM built the system into all early '70s passenger cars to prevent that from happening.
The paper describes the General Motors Steering Column/Transmission Shift Interlock System.
http://jimshea.corvettefaq.com/?p=928
Jim