| Re: [GMCnet] New Manny Tranny on hills [message #195324] |
Wed, 09 January 2013 20:53 |
rallymaster
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma:
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Senior Member |
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Showoff!!!! We were at about 25 mph in 1st gear with our 403 (about 10K
on the new rebuild) headed North over that pass on the way home in
November. Passenger car cam, rather than RV, and 97 Sidekick tow'd.
About 35 mph in 2nd with the old engine before the rebuild, same tow'd.
Ron (not really happy) Clark
On Wed, 09 Jan 2013 20:03:27 -0600 gene barrow <barrowgene@gmail.com>
writes:
>
>
>
>
> Back in August I posted the following:
>
> "Coach, 1976 Palm Beach has 455 w/carb and 3:70. coach weighs~11,000
> lbs.
>
> Northbound on I-5 between the Oregon border and Canyonville (about
> 100 miles) you encounter Siskiyou Summit 4310' (highest point on
> I-5) 7 miles of 6% grade on both sides,
>
> Sexton Pass (named for GMCer Dennis Sexton?) 1960', Smith Hill
> Summit 1730', Stage Road Pass 1830', Canyon Creek Pass 2020' the
> approaches to each of these passes have one to three miles of 6%
> grade
>
> All of these hills except Canyon Creek Pass required downshifting to
> second for part of the climb. .
>
> When speed drops below 50 mph and rpm drops below 2500 and vacuum is
> 5" or less I manually shift to 2nd."
>
>
> In early November my old tranny died and I installed a new Manny
> Tranny and have now driven it almost 2500 miles, including a trip
> from Red Bluff, Ca. to Hillsboro, Ore. and back over the above
> mentioned grades/passes.
>
>
> With the new Manny Tranny the coach runs "stronger' feels "lighter",
> peppier, more responsive to the throttle. Not my imagination.
>
>
> On the trip to Oregon with one exception the coach made all these
> grades without falling below below 48 mph or 2400 rpm in 3rd gear.
> So I didn't manually downshift
>
> The exception was the southbound 7 mile 6% grade.
>
> Near the top of the hill the tranny automattically downshifted to
> 2nd at about 42mph and 2200 rpm.
>
>
> --
> Gene Barrow
> Lake Almanor, Ca.
> 1976 Palm Beach
> _______________________________________________
>
Ron & Linda Clark
1978 Eleganza II
North Plains, ORYGUN
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Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
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