Re: [AMC-list] Gremlin with Overdrive Question

[Frank Swygert <farna@xxxxxxx>]

The OD doesn't take a special mount, but the crossmember does need to go back a bit more. Shouldn't be hard to reposition.

The cut-out switch is just a heavy duty normally closed momentary switch. The solenoid valve is just a small solenoid, shouldn't draw more than 10A pulling in (maybe as little as 5A) and 2-3A tops to hold. It's not like the big solenoid that activates the old Borg-Warner OD units, the Laycock-DeNormanville unit you have is hydraulic. The solenoid just moves a valve. Even most RS stores still carry momentary switches. A 2A rating at 125V or so should be more than sufficient. 10A at 12V is still only 120 watts, 2A @ 125V is 250 watts. You don't need the third gear switch. Just don't turn OD on unless in third gear. If you want one, it's a normally open momentary switch on a bracket so that the third gear shift arm depresses the switch when in third gear. It's mounted in the transmission, screws in at the front left side. You could mount a momentary switch on the column or outside so the shift lever hits it.

The cut-out switch was usually mounted on the throttle linkage so it would be depressed at wide open throttle. Mount it like the Borg-Warner auto kick-down switch -- which would be a good switch to use. I haven't messed with the L-D unit, but have done a lot with the BW units. Wiring is harder on the BWs because the solenoid draws more power.

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Date: Thu, 10 Feb 2011 20:02:14 -0800 (PST)
From: Joe Fulton<piper_pa20@xxxxxxxxxxx>

I asked this same question on the AMC forum so pardon the repeat if you monitor
both sites.? I'd appreciate any information folks can offer though.

I? am a few weeks away from installing this but I thought I would ask the
question.?? I have an NOS 150T three speed tranny with OD.?? My Gremlin (76) had
a T-14 in it.? I both?trannies but?I have not measured or compared the locations
for the?tranny crossbrace and mount?and I'm wondering if the OD actually takes a
special mount.? I'll check Rockauto listings tonight, but thought I'd ask the
question.?


Another issue.? I have an NOS overdrive switch with turn signal stalk.?? What I
don't have is the wiring harness for the overdrive.?? I can fabricate a harness
from the wiring diagram in the TSM but I'm concerned about the cutout switch on
the throttle linkage.? What did AMC use there??? What is a good generic switch
to use?

Has anyone done this or does anyone have an 70s AMC with overdrive they can
photograph?

Joe Fulton

--
Frank Swygert
Publisher, "American Motors Cars"
Magazine (AMC)
For all AMC enthusiasts
http://www.amc-mag.com
(free download available!)


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