77 GEARS

[CHRIS HUBER]

MY 77 L-48 RUNS ABOUT 2400 RPMS AT 60 MPH. COULD ANYONE TELL ME WHAT KIND OF REAREND I HAVE IN MY SHARK BASED ON THIS INFO? AND IF SO, DO YOU THINK IT IS STOCK.

THANKS,

CHRIS

P.S- JOE L. DID YOU RECIEVE MY BOGUS E-MAIL ABOUT FENDER FLARES :0)

[Russell Fulks]

Re: 77 GEARS

Based on Dukes earlier post to my 77's transmission, based on factory wheel size, ~760 revolutions/mile, the ratio would be:

ratio = rpm@60mph / 760rev/mile = ~3.15

Russ Fulks

[Russell Fulks]

Re: 77 GEARS

Based on Dukes earlier post to my 77's transmission, based on factory wheel size, ~760 revolutions/mile, the ratio would be:

ratio = rpm@60mph / 760rev/mile = ~3.15

Russ Fulks

[Grant M.]

Re: 77 GEARS

I don't know if there was a 3.15 offered, but I believe that 3.08 was the optional 'highway' ratio. probably close enough to assume that's what you've got if it's stock.

[Grant M.]

Re: 77 GEARS

I don't know if there was a 3.15 offered, but I believe that 3.08 was the optional 'highway' ratio. probably close enough to assume that's what you've got if it's stock.

[Russell Fulks]

Re: 77 GEARS

I just opened up my owners manual and voila! 3.08 rear end is probably what you have. If you don't trust your tach or speedo you can do the following:

Raise the rear wheels, release the parking brake. Spin the rear wheels by hand counting how many times the drive axle rotates to complete 1 rotation of the wheel. The number of drive axle rotations is your rear differential ratio!

I just did mine today -3.70:1

Russ

[Russell Fulks]

Re: 77 GEARS

I just opened up my owners manual and voila! 3.08 rear end is probably what you have. If you don't trust your tach or speedo you can do the following:

Raise the rear wheels, release the parking brake. Spin the rear wheels by hand counting how many times the drive axle rotates to complete 1 rotation of the wheel. The number of drive axle rotations is your rear differential ratio!

I just did mine today -3.70:1

Russ

[Duke W.]

Re: 77 GEARS

It's tough to read a speedo or tach to one or two percent accuracy and the instruments themselves are probaby no better than within two percent of true at best.

It's a 3.08, and Chris, in the future would you please post in normal lower case type.

Duke

[Duke W.]

Re: 77 GEARS

It's tough to read a speedo or tach to one or two percent accuracy and the instruments themselves are probaby no better than within two percent of true at best.

It's a 3.08, and Chris, in the future would you please post in normal lower case type.

Duke