Scan for codes, sounds like its in limp mode
Suzuki carry f6a with automatic transmission stuck in third
Hello, I hope I can get some accurate advice here. I am having trouble with my f6a Suzuki Carry automatic transmission. I recently acquired it and it appears to only have high gear. There is no slippage of the transmission, but no engagement of first or second gear. Just full time third gear. I have flushed the fluid, checked the solenoids and cleaned the accumulators. Quite a bit of sludge was present, but I did not open the valve body because the gasket is very brittle and I don't have a replacement. I am wondering if the transmission is not getting the proper signal from a module or sensor to cause this issue. Can anyone help?
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Yeah, I am doing that today. Thank you. Searched for 4 hours yesterday all under the vehicle, in the cab, behind the dashboard and no TCM to be found. I am in the Philippines and in order to import vehicles without tax, they are cut up into pieces and reassembled with left-hand drive. Mine is an older one from 20 years ago. It may be that it has been limping since it was reassembled as the finished products are haphazardly reassembled. I just acquired it.
sludge is from burned up clutch discs, needs a full rebuild. You could attempt to clean out the valve body with solvent once removed from the transmission externally without taking it fully apart, but if you do get it to shift the gears may be so burnt nothing good will happen. Rebuild or replace, there is very little to fix a transmission once it stops.
The najority of Sludge is from normal use, if its smelling burnt and heavily contaminated then that indicates a problem. If this has been in drive or 3rd all its life, then I'd expect a higher sludge content from use but irs not necessarily in need of a rebuild, although its life expectation is reduced.sludge is from burned up clutch discs, needs a full rebuild. You could attempt to clean out the valve body with solvent once removed from the transmission externally without taking it fully apart, but if you do get it to shift the gears may be so burnt nothing good will happen. Rebuild or replace, there is very little to fix a transmission once it stops.
There doesn't appear to be a TCM or even an ECM on this model according to the technician that looked at it today. He suggested that I take a look at the selector switch on the transmission to make sure it is functioning properly or buy another transmission. I think before I buy another transmission I would try to hard wire the solenoids directly with some button or switch on the gear selector lever on the console, if not try to make it work manually.
Maybe, but I think it's just an engagement issue. I want to get first and second to engage to see what's there even if I have to try some type of direct connection via a switch for gears one and two.sludge is from burned up clutch discs, needs a full rebuild. You could attempt to clean out the valve body with solvent once removed from the transmission externally without taking it fully apart, but if you do get it to shift the gears may be so burnt nothing good will happen. Rebuild or replace, there is very little to fix a transmission once it stops.
The challenge with vehicles in the Philippines is a combination of lack of documentation and also not knowing what has been adapted during the "re-construction" -There doesn't appear to be a TCM or even an ECM on this model according to the technician that looked at it today. He suggested that I take a look at the selector switch on the transmission to make sure it is functioning properly or buy another transmission. I think before I buy another transmission I would try to hard wire the solenoids directly with some button or switch on the gear selector lever on the console, if not try to make it work manually.
What can you tell us about the transmission - is there a tag with a model number? How many speeds? Overdrive? How many solenoids does it have? If it's got two or more, there is a very high probability it is electronically shifted in which case there HAS to be a controller, either separate or, if the engine is fuel injected, possibly integrated into the ECU.
It has two shift solenoids. There is no control module. I am pretty sure it was removed because there is a mount for it under the dash. I found that the gear shift switch on the tranny has been epoxied due to some damage in the past. I was able to get first gear operating by removing cleaning and adjusting it by trial and error, however it only works when manually selected. There is no ECM to be found either. It seems this vehicle is running like they did before ECMs were integrated. Tomorrow I will try to get second gear going by jumping my green and pink wire from the gear shift indicate switch 2nd gear position or indicator light in the instrument cluster to both solenoids ( blue black and blue white wires) hoping the current will engage both solenoids for second gear. If it works I will have all three gears that can work when manually shifted which is fine. Shifting from first to third is quite a jump in ratio. Yeah, I know, it's a Frankenstein set up but I found that the blue black wire that normally goes from the TCM to the solenoid was melted somewhat at the last minute of my work day, so that was probably the initial problem before everything was cut out. It looks a mess with all the wires to nowhere now that I am working on it and test driving, but it's gonna be gold! LolThe challenge with vehicles in the Philippines is a combination of lack of documentation and also not knowing what has been adapted during the "re-construction" -
What can you tell us about the transmission - is there a tag with a model number? How many speeds? Overdrive? How many solenoids does it have? If it's got two or more, there is a very high probability it is electronically shifted in which case there HAS to be a controller, either separate or, if the engine is fuel injected, possibly integrated into the ECU.
Test driving without the dash, that is...
Not all vehicles have ECMs, all of the Carry vans that I've driven had carburettors, so no ECM, they were also manual transmission vans. If your F6a is fuel injected it will have an ECM, if it has a carb, then it won't.
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