TRANSMISSION GEARING
| These
tables are based on a 26" rear
tire diameter.
|
There
is no such thing as an
ideal transmission/differential ratio combination. But - some
pairing will work better
than others for your conditions. Smaller engines require a
shorter first gear (under 8 mph/1000rpm) while more cubic inches might
allow 10 mph/1000rpm to be comfortable. If you like
comfortable cruising, most people like to have a top gear that keeps
the engine rpm below about 2300 rpm at a typical highway speed, but
some have a higher tolerance for noise than others.  |
| 4-Speed
Top
Loader, wide ratio |
|
1st |
2nd |
3rd |
4th |
| Ratios: |
2.78:1 |
1.93:1 |
1.36:1 |
1:1 |
| Dif. |
Speed@
1000RPM |
| 3.07 |
9.1 |
13.1 |
18.5 |
25.2 |
| 3.31
| 8.4 |
12.1 |
17.2 |
23.4 |
| 3.54 |
7.9 |
11.3 |
16.1 |
21.8 |
|
| 4-Speed Top
Loader, close ratio |
| |
1st |
2nd |
3rd |
4th |
| Ratios: |
2.32:1 |
1.69:1 |
1.29:1 |
1:1 |
| Dif. |
Speed@
1000RPM |
| 3.07 |
10.9 |
14.9 |
19.5 |
25.2 |
| 3.31
| 10.1 |
13.8 |
18.1 |
23.4 |
| 3.54 |
9.4 |
12.9 |
16.9 |
21.8 |
|
T-5
5-speed
Some
T-5's are geared like the Tremec
3550 |
| |
1st |
2nd |
3rd |
4th |
5th |
| Ratios: |
2.95:1 |
1.94:1 |
1.34:1 |
1:1 |
.63:1 |
| Dif. |
Speed@
1000RPM |
| 3.31:1 |
7.9 |
12.0 |
17.4 |
23.4 |
37.1 |
| 3.54:1
| 7.4 |
11.3 |
16.3 |
21.8 |
34.7 |
| The taller
top-gear combinations don't have very impressive
accelleration. A downshift is necessary for vigorous passing,
but
that's half the fun of driving, isn't it?
|
| Tremec
3550/TKO/500 5-speed |
| |
1st |
2nd |
3rd |
4th |
5th |
| Ratios: |
3.27:1 |
1.97:1 |
1.34:1 |
1:1 |
.68:1 |
| Dif. |
Speed@
1000RPM |
| 3.31:1
| 7.1 |
11.8 |
17.4 |
23.4 |
34.4 |
| 3.54:1
| 6.7 |
11.0 |
16.3 |
21.8 |
32.1 |
|
| Tremec TKO
II 5-speed |
| |
1st |
2nd |
3rd |
4th |
5th |
| Ratios: |
3.27:1 |
1.97:1 |
1.34:1 |
1:1 |
.83:1 |
| Dif. |
Speed @
1000rpm |
| 3.31:1 |
7.1 |
11.8 |
17.4 |
23.4 |
28.2 |
| 3.54:1 | 6.7 | 11.0 | 16.3 | 21.8 | 26.3 |
|
| Tremec
600 |
| |
1st |
2nd |
3rd |
4th |
5th |
Alternate
5th |
| Ratios: |
2.87 |
1.89 |
1.28 |
1:1 |
.82:1 |
.64:1 |
| Dif. |
Speed@
1000RPM |
| 3.07:1
| 8.8 |
13.3 |
19.7 |
25.2 |
30.7 |
39.4 |
| 3.31:1
| 8.1 |
12.4 |
18.3 |
23.4 |
28.5 |
36.5 |
| 3.54:1 |
7.6 |
11.6 |
17.1 |
21.8 |
26.6 |
34.1 |
|
| Richmond
Gear 5-speed ratios |
| |
1st |
2nd |
3rd |
4th |
5th |
| Ratios: |
3.27:1 |
2.13:1 |
1.57:1 |
1.23:1 |
1:1 |
| Dif. |
Speed@
1000RPM |
| 2.88:1
| 8.5 |
13.1 |
17.8 |
22.7 |
27.9 |
| 3.07:1
| 8.0 |
12.3 |
16.7 |
21.7 |
26.2 |
| 3.31:1 |
7.4 |
11.4 |
15.5 |
19.7 |
24.3 |
|