[AT] Shift on the go - (was)Ramble: I broke a MF 255 into 2 pieces

[Allen V. Pruehs]

Oliver offer the Power-booster" drive on the 880 and 770 in 1958.  This was 
followed by the Hydrapower drive in the four digit series tractors (1600, 
1800 & 1900). The Over/Under came later and is a three speed unit. At one 
point you could order a tractor with out the power shift, with the 
Hydrapower (2 speed) or with the Over/Under unit. There was also a special 
creeper gear power shift unit which really droped the speed.

Take care,
Allen Pruehs
SE Michigan

At 04:43 PM 1/8/2005, you wrote:

>Can't say when I first saw an Oliver with this feature but a torque
>converter drive was available on the model 990 in the late fifties. I seem
>to recall reading ads for Oliver mentioning "hydra-lectric drive" which
>sounds like another version of shift on the go.
>
>Ralph in Sask.
>http://lgoff.sasktelwebsite.net/