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FMX Issue

Started by 69 GT350 Vert, January 09, 2023, 08:43:56 AM

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69 GT350 Vert

In the past 6 months or so, my FMX doesn't want to downshift into first gear when engine/trans is cold.  I find the car starts out in 2nd or 3rd gear at stop signs when cold.  Anyone know what I can do to fix this?  Fluid and filter change?  Thanks.

Bill

Quote from: 69 GT350 Vert on January 09, 2023, 08:43:56 AM
In the past 6 months or so, my FMX doesn't want to downshift into first gear when engine/trans is cold.  I find the car starts out in 2nd or 3rd gear at stop signs when cold.  Anyone know what I can do to fix this?  Fluid and filter change?  Thanks.

Have you checked the fluid level "hot"?
When is the last time you changed the fluid and filter?
If not low, I'd start with the fluid and filter change and see how that goes.

Bill
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crossboss

Inside the trans where the shifter attaches, the large nut (inside) can be loose. This will cause the issues you describe. However, it is wise to take your car to a qualified transmission shop to be sure.
Past
1968 GT-350
1970 GT-500 #3129 Grabber Orange
Current
1969 Mustang Fastback FOX chassis 5 speed 4 wheel discs Can-Am 494 Kaase heads intake with 1425 cfm Autolite Inline carb Trans-Am style
1970 AMX 5 speed 4 wheel discs
1965 Volvo P1800  CA black and gold plates
1993 Grand Prix LQ-1 3.4 DOHC

TOBKOB

sounds like the governor sticking.

TOB
1969 GT350 owned since 1970

crossboss

#4
'Usually' when the governor is sticking it won't go into gear until it is completely warmed up.
Past
1968 GT-350
1970 GT-500 #3129 Grabber Orange
Current
1969 Mustang Fastback FOX chassis 5 speed 4 wheel discs Can-Am 494 Kaase heads intake with 1425 cfm Autolite Inline carb Trans-Am style
1970 AMX 5 speed 4 wheel discs
1965 Volvo P1800  CA black and gold plates
1993 Grand Prix LQ-1 3.4 DOHC

FL SAAC

easy peasy take it to a honest knowledgeable transmission shop

you will save your most valuable asset "time" and continue to enjoy your vehicle once properly diagnosed and repaired by a professional

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69 GT350 Vert

I called the shop in Hanover, PA that rebuilt my FMX back in 2013.  He said it was the governor that is sticking.  I need to remove the governor and clean it out.  He thinks there is a removable governor inspection plate on the tailshaft housing to allow me to do this myself.  If not, then I have to take it to a tranny shop to remove the tailshaft housing to clean out the governor.