Manual transmission identification?

[10sun]

I haven't had a chance to get climbing under my 1983 Bronco that much other than to adjust the clutch (I was hoping that would help out with the difficult start ups & impossible downshifting to 1st, not the case... it feels like it is unsynchronized).

It is dark out and the ground is muddy, so I don't feel like wiggling under there much tonight; so I am going to try to crowdsource the answer.

The Base Info that I know: 1983 Fullsize Bronco // i6 300 // 4 speed manual // 4L 4H 2H transfer case

My shift pattern is:

R13

_24

From what I have been reading the Borg Warner T18 & NP 435 are both:

13

24R

Any ideas? I'm just trying to figure out what the **** it is.

 

[Krafty]

sounds like a 4sp toploader or T-170 from a mustang or ranchero, I had a t-18 in my 81 bronco and yeah the shift pattern was

1 3

2 4 R

our 69 mustang on the other hand is a 4 spd top loader with

R 1 3

2 4

ps cant get the damn number spacing right on the bottom one but you get the idea

 

[Krafty]

I did however just read that different years/ models with the t-18 used both shift patterns. step one would be to have a good look at it and try to id it from a tag, serial number, or overal size and dimensions.

 

[10sun]

I'll crawl under there tomorrow to take a closer look. It definitely feels like 1st & reverse aren't synchronized which would eliminate the toploader, but it could just be the fact the clutch is shit.

I appreciate your insight.

 

[Krafty]

my t-18 also didnt have syncros on 1st or reverse, but my 1st was also so slow I could take off in 2nd, and usually did. 1st was more for taking off with a load from a stop where you don't need a syncro, and no reverse syncro was a sort of saftey mechanism so you dint hit reverse while trying to hit another gear.

 

[miesk5]

yo,

Model: M5OD-R2

Type: Five speed Mazda Overdrive

Years: 88-96 Bronco, F150s

97-03 F150s

05 F150 (v6)

Engines: 300, 302, 4.2L, 4.6L

Fluid: Mercon

shift pattern is:

1.3.(D)

2.4.R

Ratios:

1st 3.90:1

2nd 2.25:1

3rd 1.46:1

4th 1.00:1

5th 0.80:1

Construction features: External Ribs in square patterns

Trans code: M

Model: SROD

Type: Four speed overdrive w/ push down reverse

Years: 80-83(4?)

Engines: 300, 302

Fluid: ?

shift pattern is:

P..R..1..3

U

S.....2..OD

H

Ratios:

1st 3.25:1

2nd 1.92:1

3rd 1.00:1

4th 0.78:1

Reverse 3.25:1

Construction features: Aluminum, shifter near back

Trans code: B

Model: NP-435

Type: Four speed non overdrive

Years: 80-87?

Engines: 300, 302, Your mostly gonna find it behind a 300.

shift pattern is:

1.2

3.4.R

Construction features: Cast Iron w/aluminum top plate, shifter in top, PTO Pass side

Fluid: 140w

Ratios:

1st 6.69:1

2nd 3.34:1

3rd 1.79:1

4th 1.00:1

Reverse 3.25:1

Trans code: A

Model: T18

Type: Four speed, non overdrive, non syncro first gear

Years: ?

Engines: 300, 302, 351, 460

Fluid: ?

shift pattern is:

1.3

2.4.R

Construction features: Cast iron throughout

Ratios:

Gas

1st 6.32

2nd 3.03:1

3rd 1.79:1

4th 1.00:1

Diesel

1st 4.02:1

2nd 2.41:1

3rd 1.41:1

4th 1.00:1

Trans code: F or P

Model: T19

Type: Four speed, non overdrive, syncro first gear

Years: ?

Engines:460?, 6.9L, 7.3L

Fluid: ?

shift pattern is:

1.3

2.4.R

Construction features: Cast iron throughout

Ratios:

Gas

1st 6.32

2nd 3.03:1

3rd 1.79:1

4th 1.00:1

Diesel

1st 4.02:1

2nd 2.41:1

3rd 1.41:1

4th 1.00:1

Trans code F or P

Model: ZF5

Type: Five speed heavyduty overdrive

Years: 87-99 F2/3/450/superduty

Engines: 300, 351, 460, 7.3

Fluid: Mercon

shift pattern is:

1.3.(D)

2.4.R

Ratios:

S5-42 (Diesel)

1st: 4.14

2nd: 2.37

3rd: 1.42

4th: 1.00

5th: 0.77

Reverse: 3.79

RTS 4-spd w/OD (Transmission code is B)

T170FT-RTS Top loaded 4 speed with 4th being overdrive. Aluminum case and shift tower. 1984-87 Trucks: Aluminum, top loaded case with tower shift. All units have Overdrive. Mainshaft Reverse is located on the outside of the 1st/2nd slider and all synchro rings have 36 teeth. The 3rd gear on the cluster gear is larger than the 4th gear (the front gear). Casting number 260XXXX

The RTS shifter housing comes straight up off of the trans and not the tailshaft housing like the other tremec. It also does not have a side cover on the RTS.

Aluminum casing and the code "RTS" stamped on the tag

The shift pattern is:

13

24R

The RTS has an aluminium case and no drain plug (unless added)





more Info LINKS in my site @ http://www.broncolinks.com/index.php?index=16

 

[Brwbronco]

I had the same problem identifying my tranny. My bronco is an 82 with the inline 6 but I have the same shift pattern. I believe what it is Model SROD

Type: Four speed overdrive w/ push down reverse

Years: 80-83(4?)

Engines: 300, 302

Fluid: ? (I've been told it uses

shift pattern is:

R..1..3

...2..OD(4)

Ratios:

1st 3.25:1

2nd 1.92:1

3rd 1.00:1

4th 0.78:1

Reverse 3.25:1

Construction features: Aluminum, shifter near back

Trans code: B