I have a Ford c6 (4x4) with a shift kit, behind a built 390...When I first bought the truck I noticed weird sounds from the tranny area, mostly when in 2nd gear +. The noise went away, so I didnt think anything else of it, untill the other day when I heard the noise again... Only alot worse. 1st gear sounds OK, but when I hit 2nd and on up it sounds like hell. It vibrates, grinds, sounds like its not fully engaging or somthing... The tranny shifts strong, doesnt slip at all, no oil leaks, plenty of oil.

I should just pull it and inspect it, but money is tight and tools are limited. Im not driving it untill this problem is fixed, but I'd really like to ditch the 4banger Heep for my Ford SOON!


Any ideas of what might be wrong?
How much would it run (Roughly) to have a shop do the work?

Thanks guys,

-Dallas

 

You think $$ is tight now, wait till that puppy blows. You are likely ruining some expensive parts that are not normally replaced during a rebuild. Sorry for the bad news, the good news is, there are some very knowlegable guys here that know a lot more than me, hopefully they will be along to help. It might be an easy (cheap) fix

 

I agree, if you blow it you maybe looking at not only hard parts but a case. ARE YOU SURE IT IS THE TRANSMISSION? Could it be the transfer case? I tend to think it may not be the trans but the transfer case. Like a bearing, or chain. There isn't much in trans that would make noise then not then again, Planetary Gears, or sprag?

 

Thanks for the reply!


Im hoping someone has had a similar problem and diagnosed it as an easy fix, but if not then I will probably take it to Chancler's Transmissions, as he's the one that built it. I like to learn how to rebuild and fix things on my own, but im not a very strong person and the thought of having to lower and lift a tranny isnt too appealing.

 

Im not sure its the trans, I have been having problems with the T-case (203). However, I only notice the noise in 2nd on up, and when im going a decent speed and I brake for a stop sign,etc. the noise is really bad, the gas peddle vibrates, and it sounds like grinding.


Hmmmm.

 

Hmm, well, I think I found the culprit...


I pulled the rear housing of the T-case and here is what I found:


That is supposed to be 1 gear, isnt it?

 

Nope its just the one and only 4 speed 203

 

Sweet! So its rare then? Anyone want it? $1,000???


So heres what is puzzling me... The gear that broke is the one that sits on the side of the other 2, I dont know how to explain it.. But its the only one that sits on the side, and engages the inner and outer- gear. If it was broken, wouldnt it no longer give power to the rear end? I definately had power in the rear, but it was alot more sluggish then normal...

Oh, and anyone know what that specific part is called by any chance? And where I can order one?


Thanks guys!

 

Go check in my gallery look for the NP 203 parts break down I also have all the part numbers.

CHAIN DRIVE HOUSING Item: 25
All application models 474675 25

CHAIN DRIVE SPROCKET Item: 29
2 1/2" Wide 465410 29
2" Wide 474614 29

CLUTCH SLEEVE Item: 30, 7
Differential Lock-Out 347440 30
Lock-Out 335193 7

CLUTCH SPRING Item: 31
All application models 335184 31

CLUTCH SPRING SEAT Item: 32
All application models 335188 32

COUNTER GEAR ROLLERS Item: 18
Each 9431705 18

COUNTERSHAFT Item: 20
All application models 335176 20

COUNTERSHAFT BEARING SPACER Item: 16, 19
Long 335178 19
All application models 335177 16

COUNTERSHAFT GEAR Item: 17
All application models 335180 17

DETENT PLATE Item: 9
All application models 335173 9

DIFFERENTIAL CARRIER Item: 38
One Piece Differential Housing,w/Gears, Replaces two piece carrier. 14016385 38
One Piece Differential Housing,w/o Gears, Replaces two piece carrier. 476786 38
Two Piece Differential Housing,w/Gears 476785 38
Two Piece Differential Housing,w/o Gears 476786 38

DIFFERENTIAL GEAR UNIT Item: 43
Includes Oil Pump Gear. 458500 43

DIFFERENTIAL HOUSING Item: 45, 49
Aluminum Type,Front 468209 45
Cast Iron Type 6259079 45
All application models 468204 49

DIFFERENTIAL HOUSING SEAL Item: 46
All application models 344282 46

DIFFERENTIAL PINION GEAR Item: 41
All application models 6273995 41

DIFFERENTIAL PINION SPIDER Item: 55
10 Spline Front Shaft 14016388 55
30 Spline Front Shaft 476778 55

DIFFERENTIAL ROLLERS Item: 42
All application models 457188 42

DRIVE CHAIN Item: 28
2 1/2" Wide 6273991 28
2" Wide 474613 28

GASKET SET
Aluminum Rear Housing 461909 0
Cast Iron Rear Housing 461908 0

INPUT BEARING Item: 4
All application models 9422715 4

INPUT BEARING RETAINER Item: 1, 24
Inner 6259038 24
Outer 6273987 1

INPUT SEAL Item: 2
All application models 14095609 2

LOCK-OUT FORK Item: 14
All application models 335183 14

LOCK-OUT LINK Item: 12
All application models 376131 12

LOCK-OUT SHAFT Item: 11
All application models 6273989 11

LOW GEAR WASHER Item: 23
All application models 335191 23

LOW SPEED GEAR Item: 22
All application models 6259073 22

MAIN DRIVE GEAR Item: 6
Automatic Trans, 350 6259040 6
Automatic Trans, 400 376270 6
Standard Trans 344276 6

MAINSHAFT Item: 21
All application models 6273982 21

OUTPUT BEARING Item: 44, 47, 52, 54
Front 9412301 54
Rear 12339882 52
All application models 12339882 47
All application models 9428562 44

OUTPUT RETAINER Item: 51
Front 465482 51
Rear 3995881 51

OUTPUT ROLLERS Item: 37
Each 9434069 37

OUTPUT ROLLERS SPACER Item: 34, 35, 36
Center 335194 35
Front,10 Spline Shaft 335175 34
Front,30 Spline Shaft 347442 34
Rear 6273999 36

OUTPUT SHAFT Item: 33, 53
10 Spline 335189 53
30 Spline 465415 53
All application models 6273994 33

OUTPUT SHAFT SEAL Item: 48
Aluminum Rear Housing,Rear 344278 48
Rear,Cast Iron Rear Housing 6259146 48

OUTPUT SLINGER Item: 50
Front 347431 50

PINION WASHER Item: 39, 40
Large 6273996 39
Small 6259147 40

SELECTOR FORK SHAFT Item: 10
All application models 376018 10

SELECTOR HOUSING Item: 5
Aluminum Rear Housing 344274 5
Cast Iron Rear Housing 6273990 5

SHIFT FORK Item: 8
All application models 335199 8

SHIFTING SHAFT & LEVER Item: 13
All application models 335187 13

SNAP RING Item: 27, 3
Input 6259192 3
All application models 335069 27

THRUST WASHER Item: 15, 26
Front Output 335185 26
All application models 335179 15

 

Sorry for the double post, here is what I was trying to explain:






I think thats the one that broke...?

EDIT: Thanks! Ill go look now.

 

I must be a retard because I cant find the gear in your diagram.

 

It appears to be part number 41 in mine and somehow the gallery got misnamed

 

Thanks!!@@

 

Ok, so I think the gear that blew is the spider gear for the 203 differential, does that sound right?


I have a few questions regarding that.

1. How do the gears sit in the diff housing?
2. Are they welded, or do they spin?
3. ... are they round, our just half and welded?

Im sorry for the stupid questions, I just have no idea what I am doing,haha. When I pulled the cover the gear parts fell out, so I do not know where they went, or how many there was,etc.

I only found 4 broken pieces, which is confusing me.. In the diagrams I have seen, it looks as if there are 4 seprate, round gears in the diff. I only found 4 broken parts... Where are the other pieces?

And finally, where should I look to for replacing these gears?

Thanks a bunch guys.