"6-Speed manual" 1st to 4th shift

[ittybittyfds]

Can anybody tell me what the purpose of the 1st to 4th gear shift is?
it seems the trans only does it at certain time and i really dont understand what the purpose is for?

[ProchargedSS]

I've never heard a "good" explanation. Just buy a skip shift eliminator and be done with it.

[Chrisrp454]

If you are driving normal it skips to 4th to save gas.
If you are getting on it, its normal shift.
5.1) What is CAGS?

Computer aided gear selection is a hack that was invented to help raise fuel mileage ratings. It is implemented with a computer controlled solenoid that is used to lock out second and third gears. The system "kicks" in when the following conditions are met:

Engine coolant is 170° F or higher

Speed between 15 and 20 MPH

Throttle between 0 and 35%

During the lockout, a dashboard light that says "SKIP SHIFT" is illuminated and you are supposed to shift from 1st directly to 4th. There is apparently no timeout; that is, the lockout continues as long as the above conditions persist.

5.2) How can I defeat CAGS?

Prior to 1996 when OBD-II went into effect, one could simply unplug the CAGS solenoid connector to defeat it.

OBD-II is required to detect failures that impact emissions, so disconnecting the CAGS solenoid on a 1996 or newer T56 transmission car will cause a Service Emissions System (SES) warning light. A number of companies (including Chevrolet) sell !CAGS kits. The kit consists of a connector with 24 ohm resistor potted in it that simulates the electrical load of the solenoid.

A cheap alternative to the !CAGS kit is to insert an appropriately valued 1/2 watt resistor into the wiring harness connector and taping it up with electrical tape.

5.3) Where did the RPO MN6 transmission come from?

The T56 six speed manual transmission came from the 1989 Corvette ZR1 package. It was manufactured by Borg-Warner until they sold their transmission business in 1998. Tremec now builds the T56 in Mexico.

5.4) What is the difference between the Hurst factory and aftermarket shifters?

The optional Hurst factory shifter is laser cut from a stamped steel stock. The shift lever has a rubber isolator to reduces noise and vibration. The Hurst Billet Plus aftermarket shifter is machined from 6061 T-6 billet aluminum. It features a relocated pivot point that results in a shorter throw and adjustable stops.

5.5) What size threads are on the factory manual shifter lever?

The stock shifter lever users metric M16x1.5 threads.

5.6) Should I use a gasket with the AAM differential cover?

Using a gasket with the American Axle and Manufacturing will defeat the oil circulation feature of the cover and is not recommended. It's probably possible to cut holes in the GM gasket but that is not recommended either.

5.7) What is the grey sealant used on the AAM differential cover?

SLP uses a sealant is called Three Bond 1216; it is imported by Three Bond of America, Inc. It is a high temperature, non-hardening product that and is not adversely affected by the GM Lubrizol differential additive.

Three Bond does not market this product directly. However it is available from a Suzuki motorcycle or car dealer. They call it Suzuki 1216 (part number 99104-31160).

5.8) What is the proper differential fill?

According to the Camaro owners manual, the Torsen limited slip differential uses 2 quarts of synthetic 75W-90 oil (GM part number 12378261 or equivalent) and 4 ounces of GM Limited-Slip Differential Lubricant Additive (aka Lubrizol, GM part number 1052358).

According to the SLP owners insert, the Auburn uses 2 quarts of non-synthetic 80W-90 oil and 2 ounces of Lubrizol.

In both cases, the Lubrizol friction modifier is only used to reduce noise from the differential. However, leaving it out may affect your warranty.

5.9) What are the transmission ratios?

The ratios for the RPO MN6 Borg Warner T56 six speed manual are as follows:


Gear
1st
2nd
3rd
4th
5th
6th
R

Ratio
2.66:1
1.78:1
1.30:1
1.00:1
0.74:1
0.50:1
2.90:1


The ratios for the RPO MX0 4L60E four speed electronic automatic are as follows:


Gear
1st
2nd
3rd
4th
R

Ratio
3.06:1
1.63:1
1.00:1
0.70:1
2.29:1

[jpsuperman81]

In short to save gas and save us a gas guzzler tax but try this handy dandy feature its been discussed many many times on here.
Search skip shift or CAGS, which i think is computer aided gear selection

[stikSS]

It is the skip shift feature...... saves on gas mileage if you're not driving in a more than normal way. Meaning if you were to accelerate a little longer or faster, you wouldn't have that skip shift coming on. There is a part to install that will prevent it.

[UCF w00t]

Originally Posted by jpsuperman81

In short to save gas and save us a gas guzzler tax but try this handy dandy feature its been discussed many many many many many many many many many many many many many many many many many times on here.
Search skip shift or CAGS, which i think is computer aided gear selection

Fixed it for ya

[jpsuperman81]

Good fix UCF i knew I left something out lol.

[PQ]

Auto Tranny.

[slick rick]

I just got my skip shift eliminator. I plan to install it this weekend.

[zq8colorado04]

Alright so if you use the 1-4 skip shift do you shift to 5th after the engine revs in 4th to 3k?

Or if you have to slow down, do you put it in 3rd or 2nd? or leave it in 4th as if it were in 2nd already?

[BigRigMike]

Originally Posted by zq8colorado04

Alright so if you use the 1-4 skip shift do you shift to 5th after the engine revs in 4th to 3k?

Or if you have to slow down, do you put it in 3rd or 2nd? or leave it in 4th as if it were in 2nd already?

1-4-5-6 the intent is for you to skip 2 and 3. Once you shift if you need to slow down you can use all gears as usual.

[3GPa]

I've got my Cags, but no car yet.
SLP Performace had free shipping
Gus

[A.J.]

Originally Posted by Chrisrp454

5.8) What is the proper differential fill?

According to the Camaro owners manual, the Torsen limited slip differential uses 2 quarts of synthetic 75W-90 oil (GM part number 12378261 or equivalent) and 4 ounces of GM Limited-Slip Differential Lubricant Additive (aka Lubrizol, GM part number 1052358).

Don't have my manual handy but I'm quite sure it says 1 quart of synthetic 75W-90 oil and 2.5 ounces of GM Limited-Slip Differential Lubricant Additive. That's exactly what I put in and it started to run out the filler/inspection hole.

[Embalmer]

Originally Posted by slick rick

I just got my skip shift eliminator. I plan to install it this weekend.

Which one?