5 Speed Transmission Grinding

deere842 · 07-26-2011, 10:41 PM

Hey everyone,

I have a 1986 Ford Ranger Stx, 5 speed, 2.9l v6. 191,000 Miles. When I first got the truck it was making a grinding sound in 3rd gear but it was quite. I changed the gear oil (80-90) and alot of miles down the road, in 1st, 2nd, 3rd it is grinding and "clunking" at slow speeds. What caused this? Is there anything I could do to make it last a little longer till I find another transmission? Does anybody have another transmisson Forsale?

Thanks!
Ken

Heavyfire14 · 07-26-2011, 10:52 PM

your synchros are shot... i know a place in yuma, az thats real cheap... where are you located?

Heavyfire14 · 07-26-2011, 10:53 PM

btw you should post a pic of your truck... i love the old stx rangers!

Explorin94 · 07-27-2011, 07:07 AM

Sounds more like a failed bearing than a synchro. You have the dreaded FM146. Dump it and find a M5OD-R1.

deere842 · 07-27-2011, 08:30 PM

I'm located in Laurel, Maryland. A little far from you, lol. I'm going to try to go junkyard hunting this weekend to find one. And will that transmission bolt right in with only little mods? I dont know how to post pics, So here is a link to my truck. http://s394.photobucket.com/albums/p..._5926579_n.jpg

Thanks,
Ken

tx3nc · 08-01-2011, 08:19 AM

Shouldn't it be filled with ATF and not gear oil?

Hahnsb2 · 08-01-2011, 08:59 AM

No, the FM145 takes gear oil.

It sounds like bearings to me. The only one that'll bolt in without mods is another FM145, the M5OD needs different driveshafts and shift boots/floor plate.

07-26-2011, 10:41 PM	#1
deere842 New Member Join Date: Jul 2011 Year: 1986 Make: Ford Model: Ranger Posts: 13 Rep Power: 0 iTrader: (0)	5 Speed Transmission Grinding Hey everyone, I have a 1986 Ford Ranger Stx, 5 speed, 2.9l v6. 191,000 Miles. When I first got the truck it was making a grinding sound in 3rd gear but it was quite. I changed the gear oil (80-90) and alot of miles down the road, in 1st, 2nd, 3rd it is grinding and "clunking" at slow speeds. What caused this? Is there anything I could do to make it last a little longer till I find another transmission? Does anybody have another transmisson Forsale? Thanks! Ken
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07-27-2011, 07:07 AM	#4
Explorin94 Member Join Date: Aug 2007 Location: Farmington Il. Year: 1988 Make: Ford Model: Ranger Engine: 4.0 Class: 4x4 Used For: Trail Slut Posts: 2,136 Rep Power: 19 iTrader: (1)	Sounds more like a failed bearing than a synchro. You have the dreaded FM146. Dump it and find a M5OD-R1. __________________ HE WHO DIES WITH THE MOST TOYS WINS
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07-27-2011, 08:30 PM	#5
deere842 New Member Join Date: Jul 2011 Year: 1986 Make: Ford Model: Ranger Posts: 13 Rep Power: 0 iTrader: (0)	I'm located in Laurel, Maryland. A little far from you, lol. I'm going to try to go junkyard hunting this weekend to find one. And will that transmission bolt right in with only little mods? I dont know how to post pics, So here is a link to my truck. http://s394.photobucket.com/albums/p..._5926579_n.jpg Thanks, Ken
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08-01-2011, 08:19 AM	#6
tx3nc Member Join Date: Jul 2011 Year: 1993 Make: Ford Model: Ranger Engine: 3.0L V6 Class: 2WD Street Posts: 115 Rep Power: 4 iTrader: (0)	Shouldn't it be filled with ATF and not gear oil?
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08-01-2011, 08:59 AM	#7
Hahnsb2 Member Join Date: Aug 2007 Location: Battle Ground WA Year: 88-95 Make: Ford-Dodge Model: BII-Dakota Engine: 4.0-5.2 Turbo Class: Real 4WD, 3WD. Used For: Going where I point it-Going fast Posts: 4,408 Rep Power: 24 iTrader: (1)	No, the FM145 takes gear oil. It sounds like bearings to me. The only one that'll bolt in without mods is another FM145, the M5OD needs different driveshafts and shift boots/floor plate. __________________ 88 Bronco II, 4.0L, M5OD, 4.56s, Aussie Locked 8.8/D35, 1354M, 34" LTBs 95 Dakota CC, 5.2, 5 Spd, 2WD,Turbo, Megasquirt, 3.55s, Locked
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