VINCE

iTrader: (1)

Hmmm.. I am still interested. It is getting done as soon as I finish with the heads.. I can use the money for the 12 bolt on this and I should not have to change rear gears..

Big Mike

iTrader: (4)

I had asked a reputable sponsor the same question and they told me it couldn't be done.

c4c5specialist

HI there,
YOur in NY, I can do it right in front of you, OK???
If you like, besttoyou, c4c5

Big Mike

iTrader: (4)

I believe ya, just mentioning what I heard! <img src="images/icons/wink.gif" border="0">

IndyZ28

The thing with C's 1st gear ratio is that it is so deep that when shifting to 2nd it drop's you right out of your power band and it's ratio's are the farthest apart from 1st to 2nd and 2nd to 3rd. ex:
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear
3600 24 39 60 80 100 130
3700 25 40 61 83 103 133
3800 25 41 63 85 106 137
3900 26 42 64 87 109 140
4000 27 43 66 89 112 144
4100 27 44 68 92 114 148
4200 28 45 69 94 117 151
4300 29 46 71 96 120 155
4400 29 47 73 98 123 158
4500 30 49 74 100 126 162
4600 31 50 76 103 128 166
4700 31 51 78 105 131 169
4800 32 52 79 107 134 173
4900 33 53 81 109 137 176
5000 33 54 83 112 140 180
5100 34 55 84 114 142 184
5200 35 56 86 116 145 187
5300 35 57 88 118 148 191
5400 36 58 89 121 151 194
5500 37 59 91 123 153 198
5600 37 60 93 125 156 202
5700 38 61 94 127 159 205
5800 39 63 96 129 162 209
5900 39 64 98 132 165 212
6000 40 65 99 134 167 216
6100 41 66 101 136 170 220
6200 41 67 103 138 173 223

You drop right down to 3850rpm's.

With the standard F-body t-56 (option A) you never drop below 4100rpm's and the 2nd to 3rd and 3rd to 4th shifts are the closest of the 3 option's. ex:
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear
3600 30 45 62 80 109 161
3700 31 46 64 83 112 165
3800 32 48 65 85 115 170
3900 33 49 67 87 118 174
4000 34 50 69 89 121 179
4100 34 51 70 92 124 183
4200 35 53 72 94 127 187
4300 36 54 74 96 130 192
4400 37 55 76 98 133 196
4500 38 56 77 100 136 201
4600 39 58 79 103 139 205
4700 39 59 81 105 142 210
4800 40 60 82 107 145 214
4900 41 61 84 109 148 219
5000 42 63 86 112 151 223
5100 43 64 88 114 154 228
5200 44 65 89 116 157 232
5300 44 66 91 118 160 237
5400 45 68 93 121 163 241
5500 46 69 94 123 166 246
5600 47 70 96 125 169 250
5700 48 71 98 127 172 254
5800 49 73 100 129 175 259
5900 50 74 101 132 178 263
6000 50 75 103 134 181 268
6100 51 76 105 136 184 272
6200 52 78 106 138 187 277

With option B's gearing you never drop below 4300rpm's and every shift falls right there between 4300 and 4400rpm's. 1-2 shift being extremely close to the F-bodies (0.88 for A and 0.90 for B), but 2-3 and 3-4 not as close. ex:
RPM 1st Gear 2nd Gear 3rd Gear 4th Gear 5th Gear 6th Gear
3600 27 39 56 80 100 130
3700 28 40 58 83 103 133
3800 29 41 59 85 106 137
3900 29 42 61 87 109 140
4000 30 43 62 89 112 144
4100 31 44 64 92 114 148
4200 32 45 66 94 117 151
4300 32 46 67 96 120 155
4400 33 47 69 98 123 158
4500 34 49 70 100 126 162
4600 35 50 72 103 128 166
4700 35 51 73 105 131 169
4800 36 52 75 107 134 173
4900 37 53 76 109 137 176
5000 38 54 78 112 140 180
5100 38 55 80 114 142 184
5200 39 56 81 116 145 187
5300 40 57 83 118 148 191
5400 41 58 84 121 151 194
5500 41 59 86 123 153 198
5600 42 60 87 125 156 202
5700 43 61 89 127 159 205
5800 44 63 91 129 162 209
5900 44 64 92 132 165 212
6000 45 65 94 134 167 216
6100 46 66 95 136 170 220
6200 47 67 97 138 173 223

Personally, I would stay with the F-body T-56 as I like a close ratio trans, but that is just my opinion. Although, if I could get the 0.80 5th and 0.62 6th I bet I could grab some topend. Might even get 6th to pull if the clutch was up to the task.

nitropickup

What about breaking the cases open and replacing only the HARD parts associated with the first three gears? If internal design is the same all we are talking about is a rebuild. Not a tranny swap.

VINCE

iTrader: (1)

That is the same thing I was thinking. That is why I do not understand the price..

c4c5specialist

Hi there,
The cost is for the following, 1,2,3,5,6 gears, both the drive and the driven.
Input shaft and seal
Inner and outer cones for all gears, except reverse, because reverse does not have them.
All driven support bearings.
Reverse syncronizer
1/2 syncro
3/4 syncro
5/6 syncro
output shaft inner and outer seals
All these parts are needed for this build, and amount to about 2600 list for them.
Besttoall, c4c5

VINCE

iTrader: (1)

That is a lot.. Still interested. I will let you know when I get the money..

99 Black Bird T/A

iTrader: (4)

[quote]Originally posted by vmoore:
<strong>That is a lot.. Still interested. I will let you know when I get the money..</strong><hr></blockquote>

Might be worth getting the part numbers and checking GM Parts Direct they are usually 40 to 50% off of list.

ls1fun

I also believe that first gear isn't rated as highly torque wise. So it depends on what you will do to your engine.

Great info though c4c5! <img src="images/icons/smile.gif" border="0">

VINCE

iTrader: (1)

I am going to price the parts.. Thanks for suggesting..

96z28

can all the guts from a c-5 z06 t-56 be put in a f-car t-56 case

RPM Transmissions

No. In order to get the C5 Z06 ratios into a f-body T56 you need to use the parts for a 2004-up GTO. The GTO transmission is a direct bolt into a F-body.It also uses the triple/double cone blocking rings like the C5 Corvette uses. If you happen to have a 2001-2004 MN12 Z06 (DXB) transmission you can purchase the outputshaft for a GTO and everything else will switch over to a F-body unit.
Rodney
RPMTransmissions.com

96z28

besides the output shaft what else has to change to bolt into an LT1 f-body and what about a clutch

96z28

another question can i change the individual gears in my f-body transmission and cone bocking rings or not

DONAIMIAN

iTrader: (18)

input shaft, front cover. I was told before it wasnt all that great lookin at it from the price v.s performance view. I would maybe look to T56 rebuilds and ask them what they could do about g-force internals.