BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
 
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 Need to make my 1-2 shift faster

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JRS9C1



Posts: 434
Join date: 2009-01-20
Age: 24
Location: Bethel ME

PostSubject: Need to make my 1-2 shift faster   Mon Apr 25, 2011 2:33 pm

Right now 1-2 shift takes about 0.68 - 0.7 seconds and I'd like to see .3 taken off that time before drag day. What kit can I get that speeds up only 1-2 shift? 2-3, as well as 3-4 are quick enough and don't need any modification.
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V8Killer



Posts: 1618
Join date: 2009-03-12
Age: 43
Location: Southern, NH

PostSubject: Re: Need to make my 1-2 shift faster   Wed Apr 27, 2011 9:21 am

JRS9C1 wrote:
Right now 1-2 shift takes about 0.68 - 0.7 seconds and I'd like to see .3 taken off that time before drag day. What kit can I get that speeds up only 1-2 shift? 2-3, as well as 3-4 are quick enough and don't need any modification.

If you already have a trans that has higher mileage on it, & has a long 1-2 shift you might be out of luck. If the band is already cooked your going to have a up-hill battle.

A shift-kit should help, as well as bringing up the line pressure (which can be achieved several ways), a trans flush is a good idea too. As far as servos go you need at least the Corvette servo.
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JRS9C1



Posts: 434
Join date: 2009-01-20
Age: 24
Location: Bethel ME

PostSubject: Re: Need to make my 1-2 shift faster   Wed Apr 27, 2011 9:33 am

Al,

Trans has 119k on it, has increased line pressure through a tune. 4.11s help take the load off it a bit. 2-3 and 3-4 shift great but it's just my 1-2.

Car has the vette servo in it. I was just thinking of shimming the spring in the 1-2 accumulator to acheive a quicker shift. Ideally I'd like to have it done for drag day Arrow
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Fishah



Posts: 1118
Join date: 2009-01-20
Age: 27
Location: Chicago, IL

PostSubject: Re: Need to make my 1-2 shift faster   Wed Apr 27, 2011 10:08 am

Replace the trans with one that doesn't have 120k.
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V8Killer



Posts: 1618
Join date: 2009-03-12
Age: 43
Location: Southern, NH

PostSubject: Re: Need to make my 1-2 shift faster   Wed Apr 27, 2011 12:26 pm

JRS9C1 wrote:
Al,

Trans has 119k on it, has increased line pressure through a tune. 4.11s help take the load off it a bit. 2-3 and 3-4 shift great but it's just my 1-2.

Car has the vette servo in it. I was just thinking of shimming the spring in the 1-2 accumulator to acheive a quicker shift. Ideally I'd like to have it done for drag day Arrow

You can shim the accumulator, heck B&M shift kits remove the springs & you install sleeves so the piston does'nt move at all! The down side when you do that is part-throttle shifts, and down shifts are WAAY to hard. Makes the car suck to drive.
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JRS9C1



Posts: 434
Join date: 2009-01-20
Age: 24
Location: Bethel ME

PostSubject: Re: Need to make my 1-2 shift faster   Wed Apr 27, 2011 1:18 pm

Ok gotcha. So let me ask you this...does removing accumulation hurt the transmission/hard parts? Am I going to be damaging anything @ part throttle with accumulation deleted altogether? I think I remember reading it's simply put there in the first place so the customer has an 'enjoyable' shift.
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bowtiepimp



Posts: 1536
Join date: 2010-06-18
Age: 29
Location: working a corner near you

PostSubject: Re: Need to make my 1-2 shift faster   Thu Apr 28, 2011 6:14 am

Faster gears? affraid


......... thats scary....... I seen what you did to the old mans tranny....... Razz







OUCH!......
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JRS9C1



Posts: 434
Join date: 2009-01-20
Age: 24
Location: Bethel ME

PostSubject: Re: Need to make my 1-2 shift faster   Thu Apr 28, 2011 9:35 am

Yup that was me...
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Need to make my 1-2 shift faster

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