Sending The Miata To 100MPH On Jackstands: The Gremlin Chase Part 4
Main › Sending The Miata To 100MPH On Jackstands: The Gremlin Chase Part 4
- This topic has 1 reply, 2 voices, and was last updated 3 years, 3 months ago by admin.
December 5, 2019 at 8:33 am #95794adminKeymaster
I’m pretty excited to get the ZF transmission into the car, just gotta keep pushing forward and get this thing figured out! I know it’s going to be great when it’s all …December 5, 2019 at 8:33 am #95795BigBen
Really hoping you can sort this out, doesnt this damage the chassis in the long run? I guess next thing is BMW style driveshaft like you said couple vids ago?December 5, 2019 at 8:33 am #95796Homebuilt Racing
Have you tried changing gearbox bushings/mounts for something with different stiffness? since vibrations are speed related, there should be something with that speed or frequency that causes it. And resonanting frequencies are determined by stiffness of elastic elements and damping. So I'd tried to replace all bushings with solid mounts at least temporary for testing.
and if it will not help – have a look on structural rigidity of places where components are mounted. Maybe those are acting as springs in your case…December 5, 2019 at 8:33 am #95797NippyMoto
Damn Greg you are persistent with trying to make a car go fast that just doesn't want to go fast hahaDecember 5, 2019 at 8:33 am #95798MiG Ren E’
safety mode to keep your from going over 75 mph .. this must be so anoying something is out of sync for sureDecember 5, 2019 at 8:33 am #95799Eric Hengesbach
Hey Greg I don’t know if this could be it or not since you were saying there are others running this kit as well with no issue but when you look at how the trans bushings are setup technically since the bolt passing through is still sits both on the transmission and on the mount that is bolted to the body it still could be sending vibrations through it even with that bushing in the middle. Think about like the diff bushings and the motor mounts. The bushing completely isolates one part of the car where no metal is touching besides either the body or what is being mounted. Maybe try throwing some rubber on one side of those bolts to see if that might at least help a little bitDecember 5, 2019 at 8:33 am #95800Zesty
I cant remember, did you already change the diff out before?December 5, 2019 at 8:33 am #95801carrington cape
Greg, it may be worth trying the jack stand test again with the driveshaft removed. I’m not entirely familiar with the trans you are running. But if it’s possible to put it in gear and bring the engine/trans speed up with the driveshaft removed then you’ll know for sure that it’s coming from the trans. If you don’t get anything then you know it’s driveshaft or rear end related. I’m sorry if you’ve already cover this I just thought about it while watching. Hoping for the best for youDecember 5, 2019 at 8:33 am #95802Andrew Hobbs
Would like to have seen a camera angle showing the rear of the transmission during vibrationDecember 5, 2019 at 8:33 am #95803Andreas Lindkvist
In Sweden we have a saying "Trägen vinner".. which is from the north where people barely speaks (hence the shortness).. means "Stubborness wins".. just keep at it, it will show itself eventually!December 5, 2019 at 8:33 am #95804Will van Houten
Creigh ze engineerDecember 5, 2019 at 8:33 am #95805Martin Armstrong
Hey just thinking, how stiff are the differential mounts???December 5, 2019 at 8:33 am #95806acornhead50
Expectation: watching the video prepared to point out the problem for Cregg
Reality: what the shitDecember 5, 2019 at 8:33 am #95807Miguel Gf Miata Bolivia
Is the worst feeling when you doesnt find de problem! I wish you the best lucky possible!! You are each time near! Cheers manDecember 5, 2019 at 8:33 am #95808Alex Chulzhanov
Well I’m glad I changed from a 260 to a ZF 6-speed before this happened lol.. Good luck Greg, maybe the custom center support driveshaft can solve your issue.December 5, 2019 at 8:33 am #95809ThePAINtrain 10
I would say it's your diff. If you over tighten the center nut on the input on the diff it can cuase diff binding. Mabye resulting in shake. Thats on my truck. Miatas might not be built the same way. I am no car expert. Just trying to give ideas. I really hope you track this problem down. I have just started my own miata adventure. You are possibly the most valuable resource in the miata car scene. Turbo coming soon.December 5, 2019 at 8:33 am #95810Jack Mcdonald
Could have just used a clear drink bottle instead of container. For next time😉December 5, 2019 at 8:33 am #95811IKilledJack
Try swapping those rubber transmission mount bushing for something hard, and see how that makes a difference. Like back on the jack stands and driving. The symptoms i would be predicting is slightly more vibration at low speed, and reduced vibration at high speedDecember 5, 2019 at 8:33 am #95812Colman Au
May or may not be an issue, the diff looks like its mounted from the PPF to the chassis with no bushings, I know your setup has delrin diff bushings but if the diff is still mounted solidly to the chassis in other places, it may cause vibration?… it's weird because driveline vibes are usually at low speedsDecember 5, 2019 at 8:33 am #95813CoTY Rusher
@7:35 did anyone else catch the two missing bolts out of the k miata nose mount or am I crazy???
Edit: Just realized fifteen other ppl pointed this out sorry Greg for the repetition lolDecember 5, 2019 at 8:33 am #95814Casual Tryhard
Have you tried swapping the diff?December 5, 2019 at 8:33 am #95815S. Byrd
Have you checked the pinion angle of the tranny and diff?
Also is it with the clutch engage or disengage make a difference?
And check your diff. Carrier and pinion beatings for play.
- You must be logged in to reply to this topic.