Replacement of Internal Components:Ĭertain components in the transmission can prevent it from shifting between gears properly.įor instance, if there’s a sticking governor with coated trans-fluid varnish, there may be shifting issues.Īccordingly, proceed to replace the internal parts of the transmission. In this case, if the automatic transmission fluid (ATF) has a temperature above 185 degrees F, it may prevent proper fluid flow and component lubrication. The temperature gauge will tell you if your transmission is overheating. Overheating, on the other hand, can cause transmission failure, which is why you should consider using an external trans fluid cooler and a temperature gauge. The heat is often produced by the torque converter and at higher converter stall speed, more heat is created before lockup. You may notice a brownish fluid and varnish on the internal components of the transmission due to overheating. The first thing you’re going to do is to carefully disassemble the 700-R4 to see if there are possible areas that are in dire need of repair.
700R4 TRANSMISSION LINES HOW TO
How to Rebuild the 700R4 TransmissionĪlthough the 700R4 transmission is reputably known to be a reliable trans, a rebuild can enhance its performance.Īccordingly, you can rebuild the 700R4 transmission using these tips. You do not have to spend more to acquire a transmission controller and wiring harness. The 700-R4 transmission has fewer components compared to electronically controlled 4L60 or 4L80.Īs such, you have fewer electronics to deal with. Lockup Converter:Ī lockup converter is evident on the 700-R4 and this component helps to lock the drive and driven sections of the converter with a clutch above 38 mph.Ĭonsequently, overheating and slippage are totally eliminated.
Fourth Gear:Ī look at the 0.70 overdrive gear of the 700-R4 shows that it provides a cruise rpm, which is the same as the Turbo 400’s 1:1 third gear with 2.48:1 rearend gearing. On the other hand, the Turbo-400 has a first gear of 2.48:1. The 700R4 transmission’s first gear is 3.06:1, which means a car that features a 700R4 and 3.55:1 rearend gearing would move like a car with a Turbo-400 transmission and 4.38:1 rearend. If that’s the case, here are some reasons why the 700R4 transmission rebuild is more ideal in a street-strip car. You may be wondering if it is entirely needful to rebuild the 700R4 transmission instead of upgrading to another transmission such as the three-speed automatic, Turbo 400. Why Rebuild the 700R4 Transmission Instead of a Replacement? Now walk with us as we show you how to rebuild the 700R4 transmission to overachieve overdrive. Therefore, you need the right parts to get a 700R4 that is more than impressive instead of switching to a new unit. The transmission may also start releasing fluid from the breather. If it needs a rebuild, you may notice a decline in Second, Third, and Fourth gears.
In terms of power, you can get over 450 lb-ft of engine torque output than what the stock transmission offers.īut first, you may want to dyno test your current 700-R4 transmission to know if it is in dire need of a rebuild, especially if it has been subjected to severe usage. A good 700R4 transmission rebuild will leave you with a ride that is more powerful, durable, and with firmer shifts.
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