Fix reving up engiane with sl1fule injection 5 speed man. trans that

It sounds like the transmission was slipping
& the fluid should not have been changed

Now it slips so you can not use it

Regardless of what was or wasn't & what
if anything could have been diagnosed &
resolved

The trans is done & has to come out & be rebuilt
or a reman installed

Once they slip & if you drive that way, ten miles
you finish them off

Surprised you would use it like that & not gone
to a trans shop, as soon as the tach flaired

Now you looking at $4,000 or more for the fix

For the rest of your life, change the fluid along
with the power steering fluid, every 3 years or less,
& you may avoid that again in the future

Whom ever did the fluid change, surely has no experience
& never road tested to find a problem, BEFORE changing the
fluid

In most case, the owner changes the fluid thinking that
is a fix,it never was,fluid is changed because it's ability
to remove heat & it's additive packages break down every
2 years

IF that is a manual trans then you have a clutch problem

check your trans fluid, if its been a while flush it and change the filter if its reving and your speed doesnt change (slipping) if your speed changes check the TPS and speed sensors on the trans as well when you change fluid.

you may have a broken band or a bad solenoid. most parts stores can tell you what the code is did you change trans filter

I don't recall what those are like under there but things I have done to leave the transmission in are,
Pull the drive shafts and unbolt the transmission mount so it can be slid back but left in the truck.
Unbolt the mount (or leave it bolted if it will move enough) so the transmission still sits on it but jack the front of it up while lifting the motor so it can be pulled out of the trans enough to clear the input shaft.
Sometimes they take a little pull the motor forward and inch and then lift and inch then pull forward another inch and then lift another inch.....

Good luck on your swap. I was just doing the head on a 87 Nissan D21 with the Z24i and was looking for a later donar with ported injection for it instead of that TB injection also.

Is it revving up when the car is idling? Is the idle speed higher than it should be? If so, you either have a vaccum leak, or your idle air control valve is bad. Sounds like the second, but i'd take it by autozone and have them pull the check engine light codes to be sure. They do it for free. If they say its a vaccum leak, let me know and I'll explain how to find it.

sounds like you have a worn syncronizer. unless it gets really bad, you can keep driving like that, be gentle with those shifts and you shouldnt have any problems. changing the fluid may help prolong the life. if it gets bad, the transmission will have to be rebuilt.

yes if you make sure the front hubs are disengaged(turn little hub releases in middle of the wheel,man trans is ok auto not ok you do need to remove the drive shaft of an auto not man

1968 Barracuda with a 318cid; The 5th digit of the vin will be (F) for the engine-318 2v rated @ 230hp.

Compression pressure--125-155 max variation 25
Spark plugs--Champion N-14Y @ .035" gap-torqued @ 30ft. lb.
Timing--man. trans @ 5 degrees btdc, auto trans @ 10 degrees btdc.
Points-- .014"-.019" gap--Dwell--28-33 degrees, max variation is 2 @ 1500 rpm--Spring tension--17-20 ounces.
Fuel pump pressure 5-7 lbs. manual pump
Hydraulic Lifters--no valve clearances
Firing order--1-8-4-3-6-5-7-2 counterclock wise rotation
Idle speed--Turn headlights on highbeams and turn a/c off
500rpm for man trans--500rpm auto trans in neutral.

Left bank of the engine (driver's side), 1-3-5-7 Right bank (passenger side), 2-4-6-8

You have to remove the speedometer drive.It has markings on it for full and add.

Your transmission fluid contain water,thats why the colour of the fluid changed to pink.And of such the clutch is slipping causing the engine to reve up before shifting - Check transmission cooler.