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lt4 ?

 
Old 03-10-2011, 08:19 AM
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firstvette99
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Default lt4 ?

what years could you get the lt4.how can you tell if a c4 has this option. thanks
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Old 03-10-2011, 08:26 AM
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CDN/AZ LT4
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Only in 1996 models...if it's a 6 speed standard, 1996 model, it's an LT4.
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Old 03-10-2011, 08:28 AM
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Joe C
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Originally Posted by CDN/AZ LT4 View Post
Only in 1996 models...if it's a 6 speed standard, 1996 model, it's an LT4.
...that would be my answer - 96, manual transmission.
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Old 03-10-2011, 08:39 AM
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RetiredSFC 97
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there's an LT4 decal/emblem on the back, right IIRC.
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Old 03-10-2011, 10:52 AM
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Originally Posted by RetiredSFC 97 View Post
there's an LT4 decal/emblem on the back, right IIRC.
Wrong. Not from the factory at least.
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Old 03-10-2011, 11:29 AM
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dukeallen
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Weren't there also 6 speed LT1s?
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Old 03-10-2011, 11:45 AM
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96 lt-4
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Yes.6speed lt1's from 92-95.Maybe 96 as an option??Every manual trans 96 I have seen is an LT4.
LT4 was an option on 97 trans am/z-28 also.Very rare but was available.
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Old 03-10-2011, 11:54 AM
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Originally Posted by 96 lt-4 View Post
Yes.6speed lt1's from 92-95.Maybe 96 as an option??Every manual trans 96 I have seen is an LT4.
LT4 was an option on 97 trans am/z-28 also.Very rare but was available.
Any factory ordered 96 with a manual, got the LT4. If you find a 96 LT1 with a manual, then somebody changed something over at some point.

The f-bodies with the LT4 were done by SLP, if I remember correctly. Only a couple hundred made.
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Old 03-10-2011, 12:05 PM
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Jimbo 89
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Originally Posted by CDN/AZ LT4 View Post
Only in 1996 models...if it's a 6 speed standard, 1996 model, it's an LT4.
LT4's also have an 8,000rpm tach (6,300rpm redline) compared to LT1 6,000rpm tach (5,700rpm redline).
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Old 03-10-2011, 01:44 PM
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Originally Posted by dukeallen View Post
Weren't there also 6 speed LT1s?
Only from '92-'95

Originally Posted by 96 lt-4 View Post
Yes.6speed lt1's from 92-95.Maybe 96 as an option??Every manual trans 96 I have seen is an LT4.
LT4 was an option on 97 trans am/z-28 also.Very rare but was available.
As others have mentioned, all manual trans '96 cars were LT4

6-speed = LT4
Auto = LT1

No auto tranny LT4 cars, unless they've been converted.
And there are a few of them out there. One forum member here has one.

If you want to prove if a '96 is a factory LT4, look at the 8th character of the VIN.
P = LT1
5 = LT4
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Old 03-10-2011, 01:59 PM
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Old 03-10-2011, 02:03 PM
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Everything above is correct. Red intake manifold, 8k tach, Vin 5. 6spd in 1996=LT4.
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Old 03-10-2011, 03:29 PM
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don't forget the 'GRAND SPORT' emblem on the throttle body.
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Old 03-10-2011, 03:44 PM
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A few things to add to the list:

Under car
- Stock LT4 exhaust systems have a crossover tube on the exhaust. Look just ahead of the spare tire carrier. LT1 did not receive the crossover tube

Engine compartment
- remove engine oil fill cap
- LT4 should be stamped into the head (may need a flash light to see it)

If you’re looking for a LT4, enjoy the hunt!

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Old 03-11-2011, 08:08 AM
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I notice mine by how much faster it is than the LT-1...Ha. Also if you look under the oil cap you can see the different rocker arms.

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Old 03-11-2011, 10:58 AM
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Old 03-11-2011, 01:59 PM
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96 lt-4
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Originally Posted by pappy.72 View Post
I notice mine by how much faster it is than the LT-1...Ha. Also if you look under the oil cap you can see the different rocker arms.

LT4 came stock with Crane sourced 1.6 roller rockers IIRC.
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Old 03-11-2011, 02:28 PM
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Paul Workman
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Originally Posted by mtwoolford View Post
don't forget the 'GRAND SPORT' emblem on the throttle body.
Did NON GS cars have a "Grand Sport" plate on the TB????

P.
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Old 03-11-2011, 02:37 PM
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Originally Posted by Paul Workman View Post
Did NON GS cars have a "Grand Sport" plate on the TB????

P.
All LT4 optioned cars came with the ”Grand Sport” TB cover – regardless if it was a GS or a CE.

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Last edited by B17Crew; 03-11-2011 at 02:39 PM.
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Old 03-12-2011, 12:21 AM
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Easiest and surest way is too look inside the oil fill cap, LT4 will be clearly stamped right in the center
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