I swapped out the auto for a 5 speed and I would like to switch to a 5 speed chip but the gm list 2 chips for the m39 5 speed and 2 for the mc4 5 speed, what are the diffrences? they are all for the same model computer, the tranny from my car is from a 88 iroc, I guess the auto chip is looking for a vss whitch the 5 speed car does not have in the tranny. alll of these chips are for the 86 z with the h code (LG4) What is the diffrence? will any of these chips work? is one better then the other? thanks

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

The difference from auto to man is *primarily* IAC movements

The Bins at DIY are EFI related,
My best luck with the CCC has always been to use the chip ecm carb cals from the ZZZ kit. But, I think that is auto only.

Reading Doug Roe's Q Jet book would be an excellent start.

 

Do I have a iac?

 

late 86 was when world class t5's were phased in. Different gear ratio's came in the different tranies. I would bet this is the difference in the chips. As far as timing changes.

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87z 383,afr 190's, comp hyd roller(242/248-.540/.562,114 sep),Ported and polished mini ram, 30lb inj, 3.42 gears, tremec 5spd, , 1,3/4" slp headers, speed pro bank to bank-wb02.
"Just remember children, no man can beat you once youv'e found the cliterous." 'chef'

 

Late 86? My data shows GM didnt use the WCT5 until 1988 models, which would be late 1987 calendar year.

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1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
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I am pretty sure it is 88 that the wc was first offered.

 

btt

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86Z28, GM 350, Jet perf Q-jet & chip Dual snorkel air cleaner, Edelbrock performer intake, Edelbrock headers, Edelbrock cat-back, Off road pipe, MSD 6AL, Accel Super Coil, Taylor Spiro-pro wires, Rapid fire plugs, Jet fan switch, World class t-5, Hurst Short Throw Shifter, Ram Flywheel, Center force dual friction clutch,Aluminum drive shaft, BW disc rear 3.45's & a posi, PBR calipers, Earls braided brake lines, Polygrapite bushings all the way around, poly tranny mount & torque arm mount, Hotchkis lower control arms & panhard rod, Rancho limiter straps, KYB struts & shocks, Gm Wonderbar, Edelbrock strut tower brace, SSM sub frame connectors, Jamex lowering springs, Carbon metallic brake pads, Crossed drilled rotors, Mobil 1 Tranny fluid & motor oil, GM syntheic rear end oil, K&N, Grant stering wheel, 1,200 watt system, Jet Black Paint, 91 Z28 rims, 92 wing, Tinted windows.

 

it turns out the chips is for a m39, and it is a anw, so do you guys have any more info for me? thanks

 

Can I use a l69 chip?