Transmission Change

[harley86]

My 1977 Eagle 05 currently has the 4 speed spicer trans. How difficult would it be to swap to a 10 or 13 speed Roadranger. Is there anybody in the Arkansas Oklahoma Texas area that could handle this swap.
I have access to a full machine shop mig, tig and stick welders, however I would rather have someone else do it if I could be sure they would do it right.

Thanks Kerry

[luvrbus]

Sonnie Gray in N Texas at the OK line can do it for you and it will be done right and any thing else you want done on the Eagle he owns one  903-815-2141, right this moment he is installing a huge ISX Cummins in a Eagle.Have you checked the 9 speed makes a good combo with a 8v71.
Or if you want to dyi I have friend Bob Gilbert that install a 10 speed in his Eagle I'll call him and see if it is ok to PM his number he lives in OK not far from Tulsa  


good luck

[gus]

My big complaint with a 9-speed is the huge gap between 8-9.

The 10 sp eliminates this gap and really helps keep up the two stroke RPMs. (I'm assuming it has a two==-stroke?)

[Bob Gilbert]

Kerry, I installed a 10 spd roadranger in my 77 05, not that hard to do. I used a shift tower and tras cover from a cable shift set up but used the two rods insted of the cables. Other things to consider are trans bellhousing, clutch, flyweel and having a driveline made.

We are curintly home from our winter run (Quartsite & Needles) so if you want to come by and I will try to explain how I did mine or you can call me at 918-462-7390.

Good luck, Bob

[TomC]

The old RTO-910 is an excellent transmission for the 8V-71 (it was designed for it).  It doesn't have a real deep low gear like the newer truck transmissions, but it will work just fine on our relatively light weight buses (as compared to a truck). If you use a new transmission, use the B ratio as the C ratio is a wide ratio with a deep low gear.  Stay away from any transmission that has L, LL, or ALL-they are construction truck transmissions with extremely low gears (the ALL is made to creep in front of a paver).  If you have the extra length, I would choose the 13 spd-basically a gear for every speed you need and shifts much faster then the 10spds.  Good Luck, TomC