The GTM Supercar Build Log

Driving Notes, and Sticky Shifting Issue Update

The GTM has been seeing consistent usage whenever it has not been raining here. Odo is now at 311 fun-filled miles. Yesterday the wife and I went for its longest drive to date – 50 miles straight and it ran great. Today I took it out for another spirited 40. I’m starting to get into WOT usage in 1st and 2nd now and getting a feel for the car’s power more. Tons of power, and I’m glad I’m on DOT legal slicks. Street tires would be absolutely useless under a heavy right foot. A WOT 3-4 shift at 3rd-gear red line breaks the tires loose. A WOT romp through 1st and 2nd spins the tires most of the way. Braking is much, much better since messing with the bias balance bar. I have some tire rubbing issues with the rear tires rubbing the inside aluminum over dips in the road at speed (stiffer springs!), and the front left tire rubs the body on some turns at speed, or while going down/up an incline while turning (ie: driveways, ramps). Not sure how to address that one yet, but it is a common issue, apparently. I have been gradually filing away at the body where it rubs to see if that can give enough clearance. Raising the ride height a 1/4″ all around might do the trick as well. The ‘what is that noise’ radiator aluminum support mod I made recently is doing its job.

Getting back to the sticky shifting issue I reported previously in regards to the main shift cable getting too hot. I ordered some Earl’s Flame Guard which came recommended on the forums. I finally received it this week so I unhooked the shift cable, slipped it on, and called it good. No issues arose during the 50 mile drive yesterday (in low 50’s weather). Today was warmer (mid/upper 60’s) and I drove the shit out of the car. After 40 miles the shifter started getting sticky, but not as bad as it  had previously without protection, and it cooled down quite quickly. I never had any problems arise while using the temporary high temp reflective wire loom on the shifter cable so I ordered up a Thermotec heat sleeve that reflects 90% of radiant heat up to 2000 degrees, which I will slide over the Earl’s Flame Guard sleeve for even more protection. This winter I will have the exhaust coated as well to reduce temps, and probably come up with a heat shield to go between the exhaust and transmission/shifter cable surface.

“Is that a Lambo?” tally: 6

2 Responses to “Driving Notes, and Sticky Shifting Issue Update”

  1. Chance Chappell Says:

    “Is that a Lambo?” -Classic
    Currently enjoying your build log from Afghanistan. Keep up the posts as they make my day and when I can horde enough cash to get my own, I am glad this site is a valuable resource. Best I have seen.

  2. admin Says:

    Hey Chance – thanks for reading and keeping up with the blog! 🙂

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