corvette servo

[94calais]

wat is a corvette servo

[eat4d]

dont kn ow

[94calais]

anyone else have an idea

[94calais]

the guy i bought my vn ss off of said he had the gear box re built with the corvette servo through it

[88GreenVN]

Little upgrade for the tranny to make the car cherp into second.

[94calais]

thanks, so it basically just makes it shift harder

[88GreenVN]

thanks, so it basically just makes it shift harder

Yep you got it - works a treat with my V8

[Cheap6]

Some more info:

The 'servo' in 4L60(E) (the auto trans used in VN-VE) speak is a hydraulically actuated piston that is used to stop the clutch housing rotating inside the trans. case in gears 2 and 4. It does that by pushing on a pin that wraps a brake band attached to the gear case tighter around the clutch housing, locking the clutch housing to the gear case.

A 'Corvette' servo is one that is used in some of the US versions of the 4L60E used in Chevrolet Corvette models and is, in essence, a bigger piston = greater apply force. The effect is to apply the band tighter, allowing greater torque to be transmitted before slip of the clutch housing inside the band under power, and, unfortunately sometimes, a faster rate of apply. Unfortunately because in planetary geartrains, like those that are used in auto trans., the element from the previous gear not required in the next gear has to disengage before the new element is selected. Just applying one element faster without also disengaging faster may cause two gears to be selected at once, even if only for a very short time. The result is components slipping. If other changes (in addition to the servo) are made at the same time, it can be OK.

[DannyboyDS]

Hey top bit of info there.

What would be the best way to avoid slip in an auto in high performance? I would assume a corvette servo would be the first step, but how would you then avoid the threat of two gears being slected at once? would that be the joys of a shift kit?

Some more info:

The 'servo' in 4L60(E) (the auto trans used in VN-VE) speak is a hydraulically actuated piston that is used to stop the clutch housing rotating inside the trans. case in gears 2 and 4. It does that by pushing on a pin that wraps a brake band attached to the gear case tighter around the clutch housing, locking the clutch housing to the gear case.

A 'Corvette' servo is one that is used in some of the US versions of the 4L60E used in Chevrolet Corvette models and is, in essence, a bigger piston = greater apply force. The effect is to apply the band tighter, allowing greater torque to be transmitted before slip of the clutch housing inside the band under power, and, unfortunately sometimes, a faster rate of apply. Unfortunately because in planetary geartrains, like those that are used in auto trans., the element from the previous gear not required in the next gear has to disengage before the new element is selected. Just applying one element faster without also disengaging faster may cause two gears to be selected at once, even if only for a very short time. The result is components slipping. If other changes (in addition to the servo) are made at the same time, it can be OK.

[goldencommodore]

i have got vt auto with a transgo stage 2 shift kit would it make it go harder is i got a corvette servo put in and wat price r they

[VZHSV]

i have got vt auto with a transgo stage 2 shift kit would it make it go harder is i got a corvette servo put in and wat price r they

go harder no.. shift harder definently
i got a corvette servo when i just rebuilt my auto followed by stage 2 shift kit etc. there no expensive at all there around 50 bucks on ebay

[BANKS]

alright now explain a stage 2 shift kit

[Commydoor]

Hey guys. Im in the process of buying the shift kit, servos and valve body seperator plate for my 4L60E. The thing im hung up on is whether to get the Corvette servo or both of the Billet servos. The Corvette one has 50% more apply pressure than standard but the Billet has another 35% more than the Corvette. Has anyone used the Billet type before? Is their any pros or cons about either ie: is the Billet too harsh a change for road use. Billet has servos for both 2nd and 4th. I was in 2 minds whether to get both Billets, kit and plate or just go the Corvette only plus kit and plate. Any feedback either way will be appreciated thanks.

[Commydoor]

Banks, a shift kit is like making your auto into a semi-manual. You can change up or down gears at near any rev without much problem plus theres bigger valves that go into the valve body to increase fluid pressure and such. As i understand it. Combined with a servo it makes changes faster and crisper with minimal slippage. Dont overlook the valve body seperator plate. The standard ones wear badly apparently and may need replacing as well.

[commycrew]

Hey, quick question, so if I just put the Corvette Servo in, it would make the shifts harder, but whats all that problem about having it selecting 2 gears? Also can I still drive it in D or do i have to go 1-2-3?

Thanks for ur help!

[greenfoam]

The servo doesn't change anything apart from making the shift from 1st to second harder and faster. Which is mostly what you need. Everything else about the gearbox stays the same

[Nanos]

and you guys all forget to have a strong auto and be a true stage 2 you will need to upgrade your clutches, bands and shell.

Just changing valve body and servos will wear your stock clutches and bands in no time at all. the killer for any box is heat, this is generated by slip. Stock clutches will not last long after changing yur valve body and servo's. Yes it will feel stronger and chirp gears but dont forget when you upgrade one part then the next part becomes the weak link.