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AD Chevy Trucks

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#69277 11/28/2006 12:24 AM
Joined: Jan 2001
Posts: 142
T
Wrench Fetcher
Wrench Fetcher
T Offline
Joined: Jan 2001
Posts: 142
I presntly haave a 3 speed. and am thinking of changing to a 4 speed.
What are the pros and cons.
Thanks

#69278 11/28/2006 1:05 AM
Joined: Feb 2002
Posts: 12,029
F
Cruising in the Passing Lane
Cruising in the Passing Lane
F Offline
Joined: Feb 2002
Posts: 12,029
what 4 speed? the original for your AD?
pros: none .... unless you need a real low 1st gear or prefer a floor shift
cons: lotsa fuss for no gain whatever, and ya gotta find the right floor cover for it or cut a good size hole in the 3spd one

if you're looking for a better high gear, note that they both have 1:1 top ratio

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics
#69279 11/28/2006 1:25 AM
Joined: Jan 2001
Posts: 428
B
Shop Shark
Shop Shark
B Offline
Joined: Jan 2001
Posts: 428
I've got an AD with one of each. The only pro I can think of is a little easier drivability with the 4 speed. 2nd gear is synchroed on the 4 speed so downshifting is easier in traffic. You very rarely use first. With the 3 speed, in order to downshift to first you've either got to come to a complete stop or double clutch as you know.

Cons, that 4 speed weighs a ton. I can bench press that 3 speed in place, but the 4 speed is a bear even with a floorjack.

If it was me, I'd leave the 3 speed if you're planning on keeping it stock.

Bob

#69280 11/30/2006 8:33 AM
Joined: Aug 2004
Posts: 36
L
Apprentice
Apprentice
L Offline
Joined: Aug 2004
Posts: 36
I have 5 cars with three on the tree, my truck has a 4 speed trans now just had it installed 4 days ago. I must say after I got used to shifting on the floor I enjoy the driving ease. coming to a complete stop is dangerous you know how crazy regular people drive. A 4 speed trans puts you in front of the traffic. You need the other things to go along with it. I have had these thjings installed over time.You need the 3:55 gear in the rear,dual exhast, dual carbs and a nice howard cam. I have these things and enjoy my truck to the max.

#69281 11/30/2006 3:27 PM
Joined: Aug 2005
Posts: 6,377
T
Ex Hall Monitor
Ex Hall Monitor
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Joined: Aug 2005
Posts: 6,377
Ditto, what Bill said.


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