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Old 08-11-2015, 05:31 PM
ta man ta man is offline
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I came pretty close to swapping out my 3.08's to 3.42's ..but after a few long highway cruises..decided not too..my current transmission is starting to show a little too much silver in the fluid..so I have a 2.75 low gear th350 coming from Hughes maybe a good alternative for a few.I'm hoping with that and a few other minor changes my car will get into the low 11.2's this year with a highway friendly 3.08!

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Old 08-11-2015, 05:40 PM
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HWYSTR455 HWYSTR455 is offline
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Originally Posted by ta man View Post
I came pretty close to swapping out my 3.08's to 3.42's ..but after a few long highway cruises..decided not too..my current transmission is starting to show a little too much silver in the fluid..so I have a 2.75 low gear th350 coming from Hughes maybe a good alternative for a few.I'm hoping with that and a few other minor changes my car will get into the low 11.2's this year with a highway friendly 3.08!
Low gear sets help, but makes for a big gear jump on shift, some cars show det at that shift point. All you can do is back off the timing. It's still a compromise in my opinion.

And how much will the total build of the trans cost? Is the spread worth spending a touch more for an OD?

Think it was Car Craft that did a 'Junkyard Builder' series and installed a 4L80E, got the trans for next to nothing, was only the peripherals they mentioned was an 'associated cost'. Interesting read, can Google it.

If you're at a point and need to replace or rebuild a trans, that makes the choice much easier.

.

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  #3  
Old 08-11-2015, 08:10 PM
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72LuxuryLeMansLa. 72LuxuryLeMansLa. is offline
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Originally Posted by HWYSTR455 View Post
Low gear sets help, but makes for a big gear jump on shift, some cars show det at that shift point. All you can do is back off the timing. It's still a compromise in my opinion.

And how much will the total build of the trans cost? Is the spread worth spending a touch more for an OD?

Think it was Car Craft that did a 'Junkyard Builder' series and installed a 4L80E, got the trans for next to nothing, was only the peripherals they mentioned was an 'associated cost'. Interesting read, can Google it.

If you're at a point and need to replace or rebuild a trans, that makes the choice much easier.

.
I understand your love for that 4L80E but saying it's 'a touch more" to go from a $1500.00 TH350 to a 4L80E is a stretch.

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Old 08-12-2015, 07:55 AM
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HWYSTR455 HWYSTR455 is offline
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I understand your love for that 4L80E but saying it's 'a touch more" to go from a $1500.00 TH350 to a 4L80E is a stretch.
The transmissions themselves are very close in price, especially if you include the cost of converter. At least that was my point.

As I mentioned, you approach the project as you do any other that is over X dollars, you can handle the peripherals the same, by saving and purchasing in stages. Plan it out. Live with whatever you have now and go for the big picture maybe is a way to look at it. In the long run, you spend less if you properly plan.

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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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  #5  
Old 08-12-2015, 11:00 AM
ta man ta man is offline
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Originally Posted by HWYSTR455 View Post
Low gear sets help, but makes for a big gear jump on shift, some cars show det at that shift point. All you can do is back off the timing. It's still a compromise in my opinion.

And how much will the total build of the trans cost? Is the spread worth spending a touch more for an OD?

Think it was Car Craft that did a 'Junkyard Builder' series and installed a 4L80E, got the trans for next to nothing, was only the peripherals they mentioned was an 'associated cost'. Interesting read, can Google it.

If you're at a point and need to replace or rebuild a trans, that makes the choice much easier.

.
For my setup cheaper than switching to a 4l80,Im happy with my highway rpms and my torque convertor..its just not the price of the transmission its everything else that has to be changed...gearing,driveshaft,crossmember...I will just settle for a car that eventually will run high tens and can cruise easily down the highway at 70 mph.

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