19mike92

does anyone know where i can get the little reducer thingy that come off the tranny and spins the spedo cable? a name to go along with it would be appreciated to. thanks

Rampage1967

Any good spedo repair shop will be able to make you one.
Otherwise try the salvage yard.

19mike92

i dont really have any spedo shops around here and ive checked the scrapyards and none of them have diesel trucks.
are the ones off of the 2wd the same as the ones off of the 4wd's?

ppiggppenn

I've heard it called a "ratio adapter", "ratio drive". "ratio reducer" and the like. I got one from a Stewart-Warner dealer for about $100 altho my old one was likely OK. What's yours doing?

19mike92

the spedo just quit so i replaced the cable. then it worked for about 100km then stopped again. when i pulled the "ratio reducer" off and spun it by hand, i could feel the little gears inside slipping or not connecting at all.

rebal

just bought one from the dealer $80 you need to know tire size axle ratio and trans type (3spd ,4spd,5spd and # of gear teeth on the piece that gos in the trans

ppiggppenn

Yikes! there's no cable to replace in these systems. What cable did you replace? Maybe we have different setups .... ?

19mike92

well in all honesty my buddy took "the cable" off and stuck it somewhere over the tranny and I removed the reducer so it is probably a wire that plugs into it. so I haven't seen what it looks like yet. I'll have a look tomoro. the trucks buried in snow.

DennyT

My best fix for this was a used garmin nuvi I got off of ebay.

50 bucks and it doesnt miss a lick and I guess if I get lost I can use it for that too.........just my .02

19mike92

I'm not good with technology. that's why I love these trucks and will never sell my old girl. even though she can be a dirty *****.

Firstgenfanatic

Is this for a 2wd or 4wd? The ratio adapter is just another piece of the puzzle that leads to the speedo working/transmission shifting into overdrive. I bought a new ratio adapter from a Dodge dealership. I'm sure a few are still floating around on the shelves.

Chrisreyn

Im guessing from your user name that your truck is a '92? If so, there is no cable, its all electrical.( fill out your sig with yoru truck info)
This thread shows the different parts and "names" for them from the service manual, which will help when you go try and find them!
"How the speedometer drive works": https://www.dieseltruckresource.com/d...d.php?t=198123
it in the "Stickey" if that link doesnt work..
Since writing that article, I have been told that many tranny shops that repair odometers have the parts in stock to replace/repair the gear reducer gears.
A few things to check....
The square output shaft for the Drive Pinion has a tendency to round off and wont drive the gears... the input shaft for the gear reducer can also round out and cause a problem..
The wiring harness itself is exposed to all the road grime/debris, and any fluids that may have leaked or dripped down the engine/tranny over the years and can break or become loose..
NAPA sells the VSS assembly , the rest of the parts are either dealer only or finding them at a tranny shop.

19mike92

yes my truck is a 1992 2wd 5 speed manual trans. the square output shaft is starting to round off but it should be fine. i can deffiantley feel the gears iunside the unit grinding and slipping

Chrisreyn

OK, well, I hope that info helps, at least in identifying the parts!

19mike92

ya thanks man. ill probably just see what the dealership has. ive looked at a few places around here and everyone says they cant get them.