what to expect?
13 April 2011, 07:35 PM
#31
Many people think you need to change the rear diff to suit a P1 box but you don't. The box will be a straight swap.
You don't need to even think about this yet, just something to bare in mind if you ever have any problems.
Harvey, P1 box code is TY754VBAAA
You don't need to even think about this yet, just something to bare in mind if you ever have any problems.
Harvey, P1 box code is TY754VBAAA
14 April 2011, 04:48 PM
#36
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if you are reffering to the p1 gearbox being a straight swap,then my car is a 1998 impreza sti type r v4..if a straight swap is fine then definetely is a good option.
16 April 2011, 11:45 AM
#41
Driven intelligently the P1 / STi 5/ STi 6 box will handle everything you will ever get out of a 20G. My STi 6 box was running well over 500 bhp in the STi 6 Wagon and did lots of drag starts including winning Scooby Shootout some years ago. That same box is now in my 95 WRX somewhere around 450/460 bhp. The only thing that has ever been changed is the viscuous diff, twice, once because a clown called Pete Croney fitted a rear diff with a 3.9 ratio when the front diff is 4.44, what an idiot and the second time because the replacement viscuous became very noisy. I have not broken any gears or synchromesh and guess the box will have done a total of about 60000 miles.
Do not fit a paddle clutch. Stick with heavy duty organic. It is the shocking on the transmission that kills the gearboxes
Do not fit a paddle clutch. Stick with heavy duty organic. It is the shocking on the transmission that kills the gearboxes
16 April 2011, 11:51 AM
#42
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Driven intelligently the P1 / STi 5/ STi 6 box will handle everything you will ever get out of a 20G. My STi 6 box was running well over 500 bhp in the STi 6 Wagon and did lots of drag starts including winning Scooby Shootout some years ago. That same box is now in my 95 WRX somewhere around 450/460 bhp. The only thing that has ever been changed is the viscuous diff, twice, once because a clown called Pete Croney fitted a rear diff with a 3.9 ratio when the front diff is 4.44, what an idiot and the second time because the replacement viscuous became very noisy. I have not broken any gears or synchromesh and guess the box will have done a total of about 60000 miles.
Do not fit a paddle clutch. Stick with heavy duty organic. It is the shocking on the transmission that kills the gearboxes
Do not fit a paddle clutch. Stick with heavy duty organic. It is the shocking on the transmission that kills the gearboxes
do u know the part numbers of the 3 boxes which are a straight swap? i would never be running over 400 bhp.
thanks very much harvey.
17 April 2011, 12:05 PM
#45
Some more information to widen your search.
The P1 box STi 5/STi 6 has a relatively low first gear of 3.166 and .738 fifth gear which reduces revs on motorway cruising at the expense of a little bit of accelleration but higher top speed. All the following boxes share the same ratios:
VBAAA, VBBAA, VB4AA, and VBCAA.
All have 4.44 rear diffs as do the following but they have lower top gears so more accelleration and less top speed. They also have a higher first gear giving more speed in first than the other boxes:
VB1CA, VB1BA, VB1EA.
I hope this helps you find the box you need.
The P1 box STi 5/STi 6 has a relatively low first gear of 3.166 and .738 fifth gear which reduces revs on motorway cruising at the expense of a little bit of accelleration but higher top speed. All the following boxes share the same ratios:
VBAAA, VBBAA, VB4AA, and VBCAA.
All have 4.44 rear diffs as do the following but they have lower top gears so more accelleration and less top speed. They also have a higher first gear giving more speed in first than the other boxes:
VB1CA, VB1BA, VB1EA.
I hope this helps you find the box you need.
17 April 2011, 12:12 PM
#46
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mine is a TY754 so stronger than the 752! I've got the supporting mods plus a SimTek so fingers crossed for a good run! I just miss my 6 speed 
Last edited by mervil; 17 April 2011 at 12:35 PM.
18 April 2011, 09:55 PM
#49
I believe that Type R gearboxes or perhaps RA gearboxes have a longer first gear and then close ratios through to 5th and that in 5th they are .825 as opposed to .738 on P1 STi 5/6 etc. but if you find the gearbox and get the number I will try and help you further.
18 April 2011, 10:10 PM
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19 April 2011, 10:08 PM
#53
Your box is the same box that is on my STI V3. The P1 box has exactly the same ratio's through 1st to 4th with a very slightly longer 5th.
I am going with a P1 box as I love the close ratio of my current box but could do with a slightly longer gear when cruising. P1 box fits the bill for me perfectly, and the fact that it is a direct box swap is even better.
Remember it's also quite a bit stronger than the boxes we are both currently running.
I am going with a P1 box as I love the close ratio of my current box but could do with a slightly longer gear when cruising. P1 box fits the bill for me perfectly, and the fact that it is a direct box swap is even better.
Remember it's also quite a bit stronger than the boxes we are both currently running.
19 April 2011, 10:20 PM
#54
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Your box is the same box that is on my STI V3. The P1 box has exactly the same ratio's through 1st to 4th with a very slightly longer 5th.
I am going with a P1 box as I love the close ratio of my current box but could do with a slightly longer gear when cruising. P1 box fits the bill for me perfectly, and the fact that it is a direct box swap is even better.
Remember it's also quite a bit stronger than the boxes we are both currently running.
I am going with a P1 box as I love the close ratio of my current box but could do with a slightly longer gear when cruising. P1 box fits the bill for me perfectly, and the fact that it is a direct box swap is even better.
Remember it's also quite a bit stronger than the boxes we are both currently running.
21 April 2011, 02:38 PM
#59
What is the question???
The DCCD from a 754 box will fit any 754 box if you have the switch and electicals to go with it.
The DCCD from a 752 will swap on to a viscuous 752 also but a 752 DCCD will not fit a 754 box and vice versa.
I have a TY754VBAAA for sale. Only came out of the car to fit a six speed. In perfect working order. £400. Will fit £155. I also have 4.44 rear diff if required.
The DCCD from a 754 box will fit any 754 box if you have the switch and electicals to go with it.
The DCCD from a 752 will swap on to a viscuous 752 also but a 752 DCCD will not fit a 754 box and vice versa.
I have a TY754VBAAA for sale. Only came out of the car to fit a six speed. In perfect working order. £400. Will fit £155. I also have 4.44 rear diff if required.