gear box not selecting 5th

V6 Technical/Performance Discussions
Post Reply
o4_boyracer_no1_o5
Junior Member
Posts: 27
Joined: August 22nd, 2006, 7:25 am
Location: Scotland,Greenock
Contact:

gear box not selecting 5th

Post by o4_boyracer_no1_o5 »

my gear box wont select 5th gear when i go to select it, all you hear is a grinding noise any solutions i can hear the pin selecting 5th when the engine isnt running....any ideas 1-4 is fine 5th isnt.....and its a 1.8 v6....thanx any pictures of what to do would help aswell...
Mnemonic
Forum Moderator
Posts: 3415
Joined: September 3rd, 2002, 2:01 am
Location: Eastern Hemisphere
Contact:

Post by Mnemonic »

you've lost 5th gear, tranny is bad, time to rebuild :) or replace
08 Infiniti G37s 6speed (The Daily)
Stillen Cold Air Intake, Z1 Plenum Power Mod, Z1 Headers, Z1 Test Pipe, OBX (Ark) Exhaust, Up-Rev Osiris Engine Management (Tuned at Z1), 20x9" 20x10" Str Racing Concave Staggered Rims, SPC Camber kit, Tein H Techs Springs

01 Lexus Is300 (LS2 Project)
93 Mx3 SE 2.5 KLZE (sold it)
93 Mx3 GS 2.0 KFZE (killed it)
o4_boyracer_no1_o5
Junior Member
Posts: 27
Joined: August 22nd, 2006, 7:25 am
Location: Scotland,Greenock
Contact:

Post by o4_boyracer_no1_o5 »

rebuild...lol....i wouldnt know were to begin

would it not be possible that if i take the cover of the side of the box it can me amend from thereas thisis were the 5th gear sits...
Mnemonic
Forum Moderator
Posts: 3415
Joined: September 3rd, 2002, 2:01 am
Location: Eastern Hemisphere
Contact:

Post by Mnemonic »

probably not as there is zero room
08 Infiniti G37s 6speed (The Daily)
Stillen Cold Air Intake, Z1 Plenum Power Mod, Z1 Headers, Z1 Test Pipe, OBX (Ark) Exhaust, Up-Rev Osiris Engine Management (Tuned at Z1), 20x9" 20x10" Str Racing Concave Staggered Rims, SPC Camber kit, Tein H Techs Springs

01 Lexus Is300 (LS2 Project)
93 Mx3 SE 2.5 KLZE (sold it)
93 Mx3 GS 2.0 KFZE (killed it)
rebel2k4
Regular Member
Posts: 542
Joined: February 29th, 2004, 2:01 am
Location: Loveland, CO

Post by rebel2k4 »

Its most likely either the syncro teeth or shift fork have worn so far out of spec it wont engage anymore.

Good news. The repair can be done in the car. Youll need a pin punch, hammer, 10mm socket, 32mm socket, impact is nice(though not completely necessary), and a 1" socket. Pop off the drivers side wheel, remove the 10mm holding on the 5th gear cover, and you can access 5th gear.

If you're interested, I have all the parts you need to fix it.
94 Mazda MX3 GS - 395 whp 397 ft lbs untuned on pump gas and stock KLDE 15 psi boost. now running 16 psi and E85.. numbers=? 425ish whp
04 GSXR 600- full exh, power commander 3, int turn signals, etc
98 Ford Ranger 3.0L
01 YZ250- most fun vehicle Ive ever owned.
95 Eclipse- built 420a, 60-1, megasquirt, 371 whp @ 17 psi, dsm-broken-car-curse
User avatar
kiwi_MX3
Regular Member
Posts: 736
Joined: August 10th, 2004, 2:01 am
Location: Backpacking in Canada in vancouver 13march onwards
Contact:

Post by kiwi_MX3 »

rebel2k4 wrote:Its most likely either the syncro teeth or shift fork have worn so far out of spec it wont engage anymore.

Good news. The repair can be done in the car. Youll need a pin punch, hammer, 10mm socket, 32mm socket, impact is nice(though not completely necessary), and a 1" socket. Pop off the drivers side wheel, remove the 10mm holding on the 5th gear cover, and you can access 5th gear.

If you're interested, I have all the parts you need to fix it.

Be pop off the passanger wheel for him as hes in Nessie land
the bonnie ilses, home of haggis.... and yea more than likely the
sincro.....
Kiwi - Native Bird Of New Zealand, semi-nocturnal, secretive bird
Flightless, though can be found flying firstclass
Poor eyesight, though can spot a good pub at 100yards.
o4_boyracer_no1_o5
Junior Member
Posts: 27
Joined: August 22nd, 2006, 7:25 am
Location: Scotland,Greenock
Contact:

Post by o4_boyracer_no1_o5 »

the syncro would the be the 5th gear wheel...? looks like it has been done before as there is gasket sealer around the cover....i love this forum do you know ive only joined 3 weeks ago and ive help and fixed every problem on my mx3 good work guys lol....
rebel2k4
Regular Member
Posts: 542
Joined: February 29th, 2004, 2:01 am
Location: Loveland, CO

Post by rebel2k4 »

kiwi_MX3 wrote:
rebel2k4 wrote:Its most likely either the syncro teeth or shift fork have worn so far out of spec it wont engage anymore.

Good news. The repair can be done in the car. Youll need a pin punch, hammer, 10mm socket, 32mm socket, impact is nice(though not completely necessary), and a 1" socket. Pop off the drivers side wheel, remove the 10mm holding on the 5th gear cover, and you can access 5th gear.

If you're interested, I have all the parts you need to fix it.

Be pop off the passanger wheel for him as hes in Nessie land
the bonnie ilses, home of haggis.... and yea more than likely the
sincro.....
good call, didnt think of that :)

the synchro is a brass colored ring with teeth. all the teeth should be sharp and pointed, with no missing pieces. you will also want to examine the shift fork to ensure there is no lip where the hub has worn into it. either of these can cause your problems, and likely one or both will be obvious upon removal
94 Mazda MX3 GS - 395 whp 397 ft lbs untuned on pump gas and stock KLDE 15 psi boost. now running 16 psi and E85.. numbers=? 425ish whp
04 GSXR 600- full exh, power commander 3, int turn signals, etc
98 Ford Ranger 3.0L
01 YZ250- most fun vehicle Ive ever owned.
95 Eclipse- built 420a, 60-1, megasquirt, 371 whp @ 17 psi, dsm-broken-car-curse
o4_boyracer_no1_o5
Junior Member
Posts: 27
Joined: August 22nd, 2006, 7:25 am
Location: Scotland,Greenock
Contact:

Post by o4_boyracer_no1_o5 »

thanks for the advise rebel
Post Reply

Return to “V6 Technical/Performance”