5th Gear Replacement Or Entirely New Tranny?
04-21-2004, 09:40 PM
#1
Junior Member
Thread Starter
Join Date: Apr 2004
Location: Toronto, Ontario
Posts: 6
Hi...well I guess as my 1st REAL post on here I should ask something that's debateable.
5th gear seems to be *gone*. I was just wondering, both in terms of cost and reliablility should I replace the 5th gear only or the entire transmission.....I'm not exactly sure what condition the rest of the gears are in and as far as I know it might be the first transmission in the vehicle.
Comments?
5th gear seems to be *gone*. I was just wondering, both in terms of cost and reliablility should I replace the 5th gear only or the entire transmission.....I'm not exactly sure what condition the rest of the gears are in and as far as I know it might be the first transmission in the vehicle.
Comments?
04-21-2004, 09:56 PM
#2
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Join Date: Aug 2002
Location: O.C. - CA.
Posts: 840
It's not a Honda. I doubt anyone has had to replace a tran's and especially not more then once. 5th gear synchro' is what goes out and not the gear itself. You have not priced a new trans' or you wouldn't have asked. I can only assume you are thinking of swapping one from a junk yard. But most likey it will have a bad 5th synchro' as well. If you can pull it and take it someplace then it can be as low as $200 otherwise it can be as high as $800.
^ wasn't meant to be rude, just didn't word it elequently.
^ wasn't meant to be rude, just didn't word it elequently.
04-21-2004, 10:01 PM
#3
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Join Date: Apr 2004
Location: Toronto, Ontario
Posts: 6
Thanks man....no I didn't price a new tranny. I was actually thinking rebuilt...if there is such a thing as a rebuilt tranny.
So basically look for a new 5th syncro. Any clue as to why 5th would go out...I would think it's one of the least used gears.
So basically look for a new 5th syncro. Any clue as to why 5th would go out...I would think it's one of the least used gears.
04-21-2004, 11:06 PM
#4
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Join Date: Aug 2002
Location: O.C. - CA.
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It's pretty common to misshift into 3rd by mistake especially without an engine torque brace. There is also another peice that should be replaced as the newer version was improved but I can't recall what it's called.
edit: replace synchro & Shift select spindle
edit: replace synchro & Shift select spindle
04-22-2004, 05:22 AM
#5
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Join Date: Dec 2003
Location: Mid-West
Posts: 791
http://www.scuderiaciriani.com/rx7/s...t_spindle.html
This site explains what is likely your problem. It was indeed common in the 1993 model cars. Mazda reportedly upgraded both the synchro and the shift select spindle on later models (94 and newer), so presumably the replacement parts are those upgraded versions. I just fixed mine a couple of months back. Sooo nice to finally not have to double clutch or match revs...
This site explains what is likely your problem. It was indeed common in the 1993 model cars. Mazda reportedly upgraded both the synchro and the shift select spindle on later models (94 and newer), so presumably the replacement parts are those upgraded versions. I just fixed mine a couple of months back. Sooo nice to finally not have to double clutch or match revs...
04-22-2004, 11:43 AM
#6
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Join Date: Feb 2004
Location: ellicott city/columbia, maryland
Posts: 83
my 5th synchro had problems since the first owner had it. because it was never fixed, eventually the grinding broke the 5th gear.
you dont really need to replace anything else just whatever is broken, hopefully just the synchro. besides that the transmission is pretty much bullet proof
you dont really need to replace anything else just whatever is broken, hopefully just the synchro. besides that the transmission is pretty much bullet proof
04-22-2004, 12:29 PM
#7
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Join Date: Mar 2004
Posts: 12
Actually O.S. Giken has a replacement trannys but the cost $$.
Enonvativ Force
20932 S. Normandie Ave.
Torrance, CA 90502
310-320-8891
I talked the U.S. distributor of O.S. Giken a Japanese transimission manufacture. They have two base transimissions for the FC and the FD each of which can handle up to 600hp.
This first has a 3 gear set, meaning the first 3 gears have a closer ratio than stock. It retails for $2000. This is probably great for a street application.
This second has a 5 gear set with all 5 gears having a closer ratio than stock. It retails for $2450. I can only guess that is would be better for some type of racing.
There are other gears options available but that just the general information. If you want to contact the distributor for information packet here's their information.
Enonvativ Force
20932 S. Normandie Ave.
Torrance, CA 90502
310-320-8891
I talked the U.S. distributor of O.S. Giken a Japanese transimission manufacture. They have two base transimissions for the FC and the FD each of which can handle up to 600hp.
This first has a 3 gear set, meaning the first 3 gears have a closer ratio than stock. It retails for $2000. This is probably great for a street application.
This second has a 5 gear set with all 5 gears having a closer ratio than stock. It retails for $2450. I can only guess that is would be better for some type of racing.
There are other gears options available but that just the general information. If you want to contact the distributor for information packet here's their information.
04-22-2004, 12:50 PM
#8
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Thread Starter
Join Date: Apr 2004
Location: Toronto, Ontario
Posts: 6
Mission, Thanks alot I really appreciate all the information. I think I'm going to take a look at my expenses over the next little while and make a decision....that 5 gear set sounds mighty tempting.
04-22-2004, 01:12 PM
#9
Senior Member
Join Date: May 2002
Location: California
Posts: 22,465
Originally Posted by Signal 2' date='Apr 22 2004, 02:22 AM
http://www.scuderiaciriani.com/rx7/s...t_spindle.html
This site explains what is likely your problem. It was indeed common in the 1993 model cars. Mazda reportedly upgraded both the synchro and the shift select spindle on later models (94 and newer), so presumably the replacement parts are those upgraded versions. I just fixed mine a couple of months back. Sooo nice to finally not have to double clutch or match revs...
This site explains what is likely your problem. It was indeed common in the 1993 model cars. Mazda reportedly upgraded both the synchro and the shift select spindle on later models (94 and newer), so presumably the replacement parts are those upgraded versions. I just fixed mine a couple of months back. Sooo nice to finally not have to double clutch or match revs...
the 5th gear was added onto the the original design in the early 70's and its never been as robust as the rest of the gears.
unlucky: if you have all the work done by a shop, the 5th gear synchro is about $700, a new tranny is about 2200-2500, and a rebuilt tranny (only needed if 1-4 dont shift well, or the bearings are bad, 5th and reverse are seperate from the other 4 gears. so if the tranny is quiet, and 1-4 shift well just fix 5th) rebuilt tranny is 2199.95-2499.95 with factory bearings and synchros. these prices are approximate, if you live where labor is cheap then it will be less $$
04-22-2004, 04:00 PM
#10
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Join Date: Dec 2003
Location: Mid-West
Posts: 791
Originally Posted by j9fd3s' date='Apr 22 2004, 10:12 AM
its upgraded, but its not a 100% fix, or in other words if you miss a shift it will still break the synchro.
the 5th gear was added onto the the original design in the early 70's and its never been as robust as the rest of the gears.
unlucky: if you have all the work done by a shop, the 5th gear synchro is about $700, a new tranny is about 2200-2500, and a rebuilt tranny (only needed if 1-4 dont shift well, or the bearings are bad, 5th and reverse are seperate from the other 4 gears. so if the tranny is quiet, and 1-4 shift well just fix 5th) rebuilt tranny is 2199.95-2499.95 with factory bearings and synchros. these prices are approximate, if you live where labor is cheap then it will be less $$
the 5th gear was added onto the the original design in the early 70's and its never been as robust as the rest of the gears.
unlucky: if you have all the work done by a shop, the 5th gear synchro is about $700, a new tranny is about 2200-2500, and a rebuilt tranny (only needed if 1-4 dont shift well, or the bearings are bad, 5th and reverse are seperate from the other 4 gears. so if the tranny is quiet, and 1-4 shift well just fix 5th) rebuilt tranny is 2199.95-2499.95 with factory bearings and synchros. these prices are approximate, if you live where labor is cheap then it will be less $$
For my clarification, are you talking about the entire 5th gear or just the synchro?
I hadn't heard of alot of problems with the gear itself, just the little brass synchro. Of course, 5th is just an OD, so I wouldn't expect it to get alot of hard use.
Also, you might be able to confirm this, but Unlucky may not want to wait TOO long to fix it. My understanding is that when the transmission is in reverse, the synchro is unsupported, and if it's broken, as mine was, it could simply fall off the shaft. Obviously this would not be a good thing. In my case, I was lucky. It was broken in two places and when I went to pick it up off the shaft, it just fell off.
Unlucky... the transmission is really not that bad of a job to take out. Doing this yourself and then taking it to a shop would probably make it much more affordable.