Topic: Twin stick grind when taking off in 1st gear

[Aaronm]

I just installed my Marlin dual case adapter in my 87 4runner with a W56B tranny and 83 front 87 rear t-cases. I have a twin stick shifter in the rear 87 t-case. I have cut down the low shift rail in the rear case and it shifts fine in low-low range, and it shifts fine in the rear 2wd/4wd shifter. The problem is when I am taking off in 1st gear in high range 2wd. When I take off I get a grind sound from the 2wd-4wd twin stick shifter. If I hold the shifter and take off the noise doesn't happen, but if I let go it makes the grind. It will only grind in 1st gear. I have checked the clearance between the body and the shifter and had the shifter out and can't see a problem. Has any one else ran into something like this?

[Aaronm [OP]]

OK looking for any help on this. I am watching the 2wd-4wd stick and when I take off in 1st the stick flexes back, I hear the grind it moves forward and flexes again and I hear the grind again. Is it possible that the detent ball spring is not holding the shift rail in place and it is flexing under load? The shifter feels solid when I shift it. It clicks between each setting. Has anyone ever had this problem?

[Cheesemaker]

Give Marlin a call in the morning!

[Aaronm [OP]]

Bought a new detent ball spring from Marlin and gonna try it out this weekend and see what happens. Also gonna check that the boot is not holding the shifter in a bind of any sort.

[Aaronm [OP]]

Installed detent spring and grind is gone. Thanks to the guys at Marlin for the help on this one.

[Goose]

This is interesting, i have the same problem, its not very loud, but i can watch the twin stick move forward and back when on and off the gas going down the road..
And i only have a single 4.7 marlin case

[Aaronm [OP]]

When I compared the stock detent spring to the Marlin one, the Marlin spring was around .25 inches longer than the stock. I think the extra length has really helped hold the shifter in place. The guys at Marlin also told me to check my t-case mounts. I think I may be buying some new ones soon, mine have over 200,000 on each of them.