GoGo87U

I understand that the 1998 Corvette had a mid-year introduction of RPO JL4 Active Handling, being installed on production cars beginning December 15, 1997.

I am reasonably confident that on that same date 1998 Corvettes also had the ABS module (EBCM/EBTCM) moved from the rear to the front of the car. This mid-year change was coded RPO JAG.

(I understand that 1998 experimental VIN Corvettes and Pace Car pilots built before December 15 actually did have JL4 and JAG.)

For the next year on 1999 Corvettes, I am fairly certain that the new Magnasteer 2 variable-effort power steering was used on all 1999 Corvettes.

However, were all 1998s Mag 1?

Or was there a mid-year introduction of Mag 2 in 1998 (similar to JL4 and JAG)?

Thanks!

Clairvoyantwolf

All C5s have magnasteer II, and no other steering system was considered. The difference between magnasteer II and I is that II can vary steering effort as it relates to vehicle G force as well as speed.

GoGo87U

Even the 1997 Corvette had Mag 2?

Clairvoyantwolf

From everything I've read (including SAE papers) yes.

GoGo87U

OK, you are correct. I see Mag II in the 1997 Corvette dealer pack.

Is there a difference between Mag II and MAGe?

If so, was MAG e put on C5 Corvettes?

Thanks.

Clairvoyantwolf

Never heard of "MAGe" before, sorry.

GoGo87U

Me neither, but from this site:

http://www.aa1car.com/library/2004/bf10434.htm

“On 1996 and 1997 applications, Magnasteer has its own separate control module. But on 1998 and newer applications, the Electronic Brake Control Module (EBCM), which also oversees the operation of the anti-lock brake system, handles the Magnasteer control function.”

“On some Magnasteer systems, such as that used in the Corvette, the Electronic Brake Traction Control Module (EBTCM) also looks at input from a steering wheel position sensor to determine if more or less steering assist is needed under certain driving conditions. The main purpose here is to reduce oversteer by reducing assist when excessive G-forces are detected

“In 1998, a second generation "Magnasteer MAGe" system was introduced on some GM vehicles. This version of the system does not use a permanent magnet, but uses a redesigned electromagnet that has one pole mounted on the input shaft and the other on the pinion shaft.”

Pounder

I was positive I could feel the difference in steering when changing modes???? now it makes sense !!! Thanks

Vetteman Jack

Thanks for the history lesson. Interesting information I had not heard about.

jackthelad

Re JAG option, see: http://www.c5registry.com/MembersOnl...n/98c5prod.htm