Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - Any interest in 4.5 final drive from Auto Factory?

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- - Any interest in 4.5 final drive from Auto Factory? (https://www.ft86club.com/forums/showthread.php?t=46457)

Any interest in 4.5 final drive from Auto Factory?

I'm thinking of buying a few of these, one for myself and the rest for others to buy. For automatics, it should make the car feel much more responsive, with a gear ratio closer to the manual. If used in a manual, it will also enhance the acceleration - but you will loose MPG as the tradeoff.

I'm not a vendor, it's just a hard part to get in the US and thought others might want one. Should I move this to the "group buy" section? Do I have to be an oficcial vendor? Should I set up a ebay/amazon account?

http://translate.google.com/translat...1&ie=Shift_JIS

Sorry it's a little off topic.
Mike

Have you found a solid price after shipping/duty? If not then you might want to consider other options. You're probably looking at $600+ per set by the time you get them in-hand. Heavy items are rather expensive to ship from Japan. There are other gear sets available with far less hassle.

I've not seen the gears in person but Weir Performance has a 4.56 set for $240 available here for the MKIII Supra. The factory gears are certainly nice but I'm not sure they're worth 2.5x the price. I have an MFactory 4.67 in my 6MT and can't tell a difference in quality between them and factory gears once installed. I doubt the Weir are any different.

@PantsDants is getting a 4.88 for his 6AT from Weir. After much debate he decided this ratio made more sense with a slushbox and put it in-line with a 6MT. Thread is here: http://www.ft86club.com/forums/showthread.php?t=45217

@JimmyMac started a discussion on final drives that you might find of interest. Thread is here: http://www.ft86club.com/forums/showthread.php?t=45152

@Crossover Auto has a group buy on MFactory 4.44 and 4.67 gears at $600 shipped. I've never dealt with them but the price is competitive for that particular gear set. Thread is here: http://www.ft86club.com/forums/showthread.php?t=43835

.

Thanks 37. I was just going around trying to assemble the links. Thank you for saving me the time hahah

Quote:

Originally Posted by 37 (Post 1203339)

Wow, $240! I did some research - the Cusco's which are rebranded Toyota and $1000+. And the AutoFactory ones for ~$460 from Japan. $240 sounds too good t be true.. are they plug and play replacements?

I also heard of people using Lexus 250/300 gears but they were talking about find it at junkyards.

4.88 is a bit much for me, since it would limit second gear top speed in autox. I'd like to keep some of the MPG.

4.55 ~ 2500 in 6th = 70mph, 7400 in 2nd = 59mph.
4.88 ~ 2700 in 6th = 71mpg, 7400 in 2nd = 55mph

Thanks for all the info!
Mike

FWIW, I'm fairly certain (read: not absolutely sure) that any of the 8" Toyota ring and pinion sets (with the exception of the reverse ones in the Land Cruiser and some other trucks) will fit our diffs. Again, not for sure, but I'm basing this off the fact that the price I got from Weir was strangely similar to all of the other options for 8" kits I've seen online (Yukon, Precision Gear, etc.). I just went with Weir for the peace of mind that he markets the parts specifically for car differentials, not trucks. And also the fact that he flat out told me it works on IS differentials.

Really liking the idea of the 4.88 for the AT.

It makes sense for the auto but I think the manual is low enough.

Quote:

Originally Posted by sierra (Post 1204035)

It makes sense for the auto but I think the manual is low enough.

Agreed. The MT even on the stock 4.10's turns a lot of RPM on the highway, and has plenty short 1-4 gears. I'm just tired of second going to 70 in my AT lol

Here's some number for 225/40/18:

Code:

MT@4.10   1st   2nd   3rd   4th   5th   6th

------- ----- ----- ----- ----- ----- -----

2000       10    17    24    30    36    47

2500       13    21    30    38    46    59

3000       15    25    35    45    55    71

3500       18    29    41    53    64    83

4000       20    33    47    60    73    95

4500       23    37    53    68    82   107

5000       25    42    59    75    91   119

5500       28    46    65    83   100   131

6000       30    50    71    90   109   142

6500       33    54    77    98   118   154

7000       35    58    83   105   127   166

7400       37    62    87   111   135   176



AT@4.10   1st   2nd   3rd   4th   5th   6th

------- ----- ----- ----- ----- ----- -----

2000       10    18    26    36    51    63

2500       13    22    32    46    64    78

3000       15    27    39    55    77    94

3500       18    31    45    64    89   109

4000       21    35    52    73   102   125

4500       23    40    58    82   115   141

5000       26    44    65    91   128   156

5500       28    49    71   100   140   172

6000       31    53    78   109   153   188

6500       33    57    84   118   166   203

7000       36    62    91   127   179   219

7400       38    65    96   135   189   231



AT@4.56   1st   2nd   3rd   4th   5th   6th

------- ----- ----- ----- ----- ----- -----

2000        9    16    23    33    46    56

2500       12    20    29    41    57    70

3000       14    24    35    49    69    84

3500       16    28    41    57    80    98

4000       19    32    47    65    92   112

4500       21    36    52    74   103   127

5000       23    40    58    82   115   141

5500       25    44    64    90   126   155

6000       28    48    70    98   138   169

6500       30    52    76   106   149   183

7000       32    56    82   115   161   197

7400       34    59    86   121   170   208



AT@4.88   1st   2nd   3rd   4th   5th   6th

------- ----- ----- ----- ----- ----- -----

2000        9    15    22    31    43    53

2500       11    19    27    38    54    66

3000       13    22    33    46    64    79

3500       15    26    38    54    75    92

4000       17    30    44    61    86   105

4500       19    33    49    69    97   118

5000       22    37    54    76   107   131

5500       24    41    60    84   118   145

6000       26    45    65    92   129   158

6500       28    48    71    99   139   171

7000       30    52    76   107   150   184

7400       32    55    81   113   159   194

Used http://www.f-body.org/gears/

Mike

Quote:

Originally Posted by Nightbringer (Post 1205140)

I'm just tired of second going to 70 in my AT lol

Amen man. Gears are crazy long in the AT. In 6th, gas mileage on the highway is pretty darn good though... My ideal state would be to keep a very efficient top gear, but alter the 1-5 on the AT. I'll sacrifice some efficiency in 6th to make the other 5 gears better though.

Quote:

Originally Posted by Captain Insano (Post 1206095)

Agreed 100%. I wish there was a way to keep that .54 ratio or whatever we have for sixth. I only need 1-3 to be nasty. I have a lot of GTO/etc friends, and it'd be nice if I could still comfortably cruise at 100 mph @ 3000 rpm, but the 0-60 is so painful with these gears. :(

Really hoping the Weir gears work out well. I wasn't even willing to consider this mod at the $1000+ pricepoint, but if I can get gears+install for ~$500? That's something I'd strongly consider. Car's presently a lease though, so they may not be too fond of that haha.

Yeah, at $500 I'd do it in a heartbeat once my warranty is up (1 year done!).

Quote:

Originally Posted by sierra (Post 1204035)

It makes sense for the auto but I think the manual is low enough.

Seems fair most complain that have hwy speed limits of 80 are already saying "rpm too high"?